Philippe JEAN-PIERRE

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2024
• Auteurs : Pierre BordetArie van Der LeeJoanna TimminsEtienne BalanDelphine CabaretRené GuinebretièreMatias VelázquezPhilippe Guionneau
• Organismes : Matériaux, Rayonnements, Structure Institut Européen des membranes Institut de biologie structurale Institut de minéralogie, de physique des matériaux et de cosmochimie Institut de minéralogie, de physique des matériaux et de cosmochimie Université de Limoges Science et Ingénierie des Matériaux et Procédés Institut de Chimie de la Matière Condensée de Bordeaux
• Publié dans L'Actualité Chimique le 02/11/2020

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Résumé : Il apparaît complexe, voire impossible, de dresser un panorama exhaustif de l’activité en cristallographie dans la recherche en France du fait de son caractère éminemment transdisciplinaire. Ce n’est pas l’objet de cet article. Il ne s’agit pas non plus de relater l’importance des activités passées des chercheurs français en cristallographie. Nous ne parlerons donc ni de René Just Haüy, d’Auguste Bravais, de Louis Pasteur, de Georges Friedel, de Charles Mauguin ni des cristallographes français contemporains qui ont été présidents de l’Union International de Cristallographie (IUCr) comme André Guinier, Jean Wyard et André Authier. Cet opus vise à illustrer la dynamique actuelle de la cristallographie dans la recherche française en se concentrant sur quelques faits majeurs récents issus des domaines traditionnellement étiquetés biologie, chimie, physique et minéralogie avec un détour par la croissance cristalline, les grands instruments et l’enseignement. Par définition, le résultat est partiel et partial. Que le lecteur nous en excuse.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2024
• Auteurs : Thomas PierreJean-Claude KrapezHelcio Rangel Barreto OrlandeChristophe RodietPhilippe Le MassonDylan Le MauxMickaël CourtoisBernard Lamien
• Organismes : Institut de Recherche Dupuy de Lôme DOTA, ONERA [Salon-de-Provence] Universidade Federal do Rio de Janeiro [Brasil] = Federal University of Rio de Janeiro [Brazil] = Université fédérale de Rio de Janeiro [Brésil] Institut de Thermique, Mécanique, Matériaux Institut de Recherche Dupuy de Lôme Institut de Recherche Dupuy de Lôme Institut de Recherche Dupuy de Lôme École Polytechnique de Ouagadougou
• Publié dans Heat Transfer Engineering le 26/10/2020

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Résumé : The article presents the estimation of temperature and emissivities of niobium and 100c6 steel around their melting points using techniques based on the minimization of the least squares norm or on Bayesian inference. Two models were considered for the spectral emissivity, including a linear variation with respect to the wavelength and independent spectral values. The measured data used for the solution of the parameter estimation problem were radiative fluxes collected from a five-wavelength pyrometer. The experimental apparatus used in this work was designed for the characterization of metal samples with sizes of few millimeters at high temperatures, combining aerodynamic levitation and laser heating. The use of the linear spectral emissivity model provided quite consistent results with the ordinary least squares estimator and with stochastic simulations using the Metropolis-Hastings algorithm. Similarly, the model of independent spectral emissivities resulted in accurate emissivities, but it required an informative prior for temperature, such as the known melting point of the metal sample. Therefore, whatever the inverse method used, a priori supplementary information in terms of emissivities or temperatures are needed due to the temperature-emissivity correlation and the unknow emissivity behavior.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2024
• Auteurs : Shreyasi AcharyaDagmar AdamovaApar AgarwalGianluca Aglieri RinellaLuca AgliettaMichelangelo AgnelloNeelima AgrawalZubayer AhammedShakeel AhmadSang Un AhnIshaan AhujaAlexander AkindinovValentina AkishinaMohammad Al-TuranyDmitry AleksandrovBruno AlessandroHaidar Masud AlfandaJose Ruben Alfaro MolinaBushra AliAndrea AliciNegin AlizadehvandchaliAnton AlkinJohan AlmeGiacomo AloccoTorsten AltAnna Rita AltamuraIgor AltsybeevJesus Ricardo Alvarado GarciaMustafa AnaamCristian AndreiNicodemos AndreouAnton AndronicEvgeny AndronovVenelin AnguelovFederico AntinoriPietro AntonioliNicole ApadulaL AphecetcheHarald AppelshaeuserCarolina ArataSilvia ArcelliMauro ArestiRoberta ArnaldiJhoao Gabriel Martins Campos Almeida ArneiroIonut Cristian ArseneMesut ArslandokAndre AugustinusRalf Peter AverbeckMohd Danish AzmiHitoshi BabaAngela BadalaJoonsuk BaeYongwook BaekXiaozhi BaiRaphaelle Marie BailhacheYoshini BailungRenu BalaAlessandro BalbinoAlberto BaldisseriBartosz BalisDebjani BanerjeeZarina BanooVeronika BarbasovaFrancesco BarileLuca BarioglioMaria BarlouBanajit BarmanGergely Gabor BarnafoldiLee Stuart BarnbyEmilie Martine BarreauValerie Ramillien BarretLeonardo Barreto de Oliveira CamposClara BartelsKlaus BarthEsther BartschNicole BastidSumit BasuGuillaume BatigneDaniel BattistiniBoris BatyunyaDibakar BauriJose Luis Bazo AlbaIan Gardner BeardenCaitlin BeattiePascal BechtDebadatta BeheraIouri BelikovAilec Bell HechavarriaFrancesca BelliniRene BellwiedSvetlana BelokurovaLucina Gabriela Espinoza BeltranYael Antonio Vasquez BeltranGyula BencediAdel BensaoulaStefania Maria BeoleYaroslav BerdnikovAnastasia BerdnikovaLuisa BergmannMihaela Gabriela BesoiuLatchezar BetevPartha Pratim BhaduriAnju BhasinBuddhadeb BhattacharjeeLivio BianchiNicola BianchiJaroslav BielcikJana BielcikovaAlexandre Patrick BigotAnte BilandzicGabor BiroSaikat BiswasNicolas Luc BizeJustin Thomas BlairDmitry BlauMihail Bogdan BlidaruNora BluhmeChristoph BlumeGianluigi BocaFriederike BockTea BodovaJeongsu BokLaszlo BoldizsarMarek BombaraPeter Matthew BondGermano BonomiHerve BorelAlexander BorissovAndres Gerardo Borquez CarcamoHannah BossiElena BottaYoussef El Mard BouzianiLars BratrudPeter Braun-MunzingerMarco BregantMichal BrozGiuseppe Eugenio BrunoValentin Dimitrov BuchakchievMatthew Daniel BucklandDmitry BudnikovHenner BueschingStefania BufalinoPaul Alois BuhlerNazar BurmasovEdith Zinhle ButheleziAleksandr BylinkinSebastian Adam BysiakJuan Carlos Cabanillas NorisMaria Fernanda Torres CabreraMengke CaiHelen Louise CainesAlberto CalivaErnesto Calvo VillarJuan Manuel Mejia CamachoPaolo CameriniFabio de Moraes CanedoSierra Lisa WeyhmillerMihai CarabasAitor Amatriain CarballoFrancesca CarnesecchiRobin Albert Andre CaronLeopoldo Abranches de CarvalhoJavier Ernesto Castillo CastellanosMatteo CastoldiFabio CatalanoSamuele CattaruzziCesar Ceballos SanchezRebecca CerriIrakli ChakaberiaPritam ChakrabortySinjini ChandraSylvain ChapelandMarielle ChartierSouvik ChattopadhaySubhasis ChattopadhyaySukalyan ChattopadhyayMeiyi ChenTiantian ChengCvetan Valeriev CheshkovVasco Miguel Chibante BarrosoDavid Dobrigkeit ChinellatoEmma Sophia ChizzaliJaeyoon ChoSoyeon ChoPeter ChochulaZuzanna Anna ChochulskaDhrubajyoti ChoudhuryPanagiotis ChristakoglouChristian Holm ChristensenPeter ChristiansenTatsuya ChujoMario CiaccoCorrado CicaloMichael Rudolf CiupekGiulia ClaiFabio Filippo ColamariaJonathan Samuel ColburnDomenico ColellaManuel ColocciMatteo ConcasG. 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• Organismes : Laboratoire de Physique de Clermont Homi Bhabha National Institute European Organization for Nuclear Research Istituto Nazionale di Fisica Nucleare, Sezione di Torino Department of Applied Science and Technology [Politecnico di Torino] Dipartimento di Fisica e Astronomia [Bologna] Homi Bhabha National Institute Aligarh Muslim University Korea Institute of Science and Technology Information Pavol Jozef Šafárik University in Košice Goethe University Frankfurt = Goethe-Universität Frankfurt am Main Frankfurt Institute for Advanced Studies GSI Helmholtzzentrum für Schwerionenforschung Istituto Nazionale di Fisica Nucleare, Sezione di Torino Central China Normal University [Wuhan, China] Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique Subatomique et de Cosmologie Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique de Clermont Laboratoire de Physique de Clermont Laboratoire de physique subatomique et des technologies associées Institut Pluridisciplinaire Hubert Curien Institut Pluridisciplinaire Hubert Curien Laboratoire de physique subatomique et des technologies associées Institut de Recherches sur les lois Fondamentales de l'Univers Institut de Physique des 2 Infinis de Lyon Institut de Recherches sur les lois Fondamentales de l'Univers Institut de Physique des 2 Infinis de Lyon Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de physique subatomique et des technologies associées Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique de Clermont Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique de Clermont Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique Subatomique et de Cosmologie Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de physique subatomique et des technologies associées Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut de Physique des 2 Infinis de Lyon Institut Pluridisciplinaire Hubert Curien Institut Pluridisciplinaire Hubert Curien Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de Physique de Clermont Institut Pluridisciplinaire Hubert Curien Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique de Clermont Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique de Clermont Institut de Recherches sur les lois Fondamentales de l'Univers Institut Pluridisciplinaire Hubert Curien Institut Pluridisciplinaire Hubert Curien Institut Pluridisciplinaire Hubert Curien Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de physique subatomique et des technologies associées Institut de Physique des 2 Infinis de Lyon Institut de Recherches sur les lois Fondamentales de l'Univers Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique de Clermont
• Publié dans JHEP le 14/01/2026

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Résumé : A study of strange hadron production associated with hard scattering processes and with the underlying event is conducted to investigate the origin of the enhanced production of strange hadrons in small collision systems characterised by large charged-particle multiplicities. For this purpose, the production of the single-strange meson ${\rm K^0_S}$ and the double-strange baryon $\Xi^{\pm}$ is measured, in each event, in the azimuthal direction of the highest-$p_{\rm T}$ particle (``trigger" particle), related to hard scattering processes, and in the direction transverse to it in azimuth, associated with the underlying event, in pp collisions at $\sqrt{s}=5.02$ TeV and $\sqrt{s}=13$ TeV using the ALICE detector at the LHC. The per-trigger yields of ${\rm K^0_S}$ and $\Xi^{\pm}$ are dominated by the transverse-to-leading production (i.e., in the direction transverse to the trigger particle), whose contribution relative to the toward-leading production is observed to increase with the event charged-particle multiplicity. The transverse-to-leading and the toward-leading $\Xi^{\pm}$/${\rm K^0_S}$ yield ratios increase with the multiplicity of charged particles, suggesting that strangeness enhancement with multiplicity is associated with both hard scattering processes and the underlying event. The relative production of $\Xi^{\pm}$ with respect to ${\rm K^0_S}$ is higher in transverse-to-leading processes over the whole multiplicity interval covered by the measurement. The ${\rm K}^{0}_{\rm{S}}$ and $\Xi^{\pm}$ per-trigger yields and yield ratios are compared with predictions of three different phenomenological models, namely PYTHIA 8.2 with the Monash tune, PYTHIA 8.2 with ropes and EPOS LHC. The comparison shows that none of them can quantitatively describe either the transverse-to-leading or the toward-leading yields of ${\rm K}^{0}_{\rm{S}}$ and $\Xi^{\pm}$.

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Fichiers liés : 2405.14511v2.pdf

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Source

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2024
• Auteurs : Shreyasi AcharyaDagmar AdamovaApar AgarwalGianluca Aglieri RinellaLuca AgliettaMichelangelo AgnelloNeelima AgrawalZubayer AhammedShakeel AhmadSang Un AhnIshaan AhujaAlexander AkindinovValentina AkishinaMohammad Al-TuranyDmitry AleksandrovBruno AlessandroHaidar Masud AlfandaJose Ruben Alfaro MolinaBushra AliAndrea AliciNegin AlizadehvandchaliAnton AlkinJohan AlmeGiacomo AloccoTorsten AltAnna Rita AltamuraIgor AltsybeevJesus Ricardo Alvarado GarciaMustafa AnaamCristian AndreiNicodemos AndreouAnton AndronicEvgeny AndronovVenelin AnguelovFederico AntinoriPietro AntonioliNicole ApadulaL AphecetcheHarald AppelshaeuserCarolina ArataSilvia ArcelliMauro ArestiRoberta ArnaldiJhoao Gabriel Martins Campos Almeida ArneiroIonut Cristian ArseneMesut ArslandokAndre AugustinusRalf Peter AverbeckMohd Danish AzmiHitoshi BabaAngela BadalaJoonsuk BaeYongwook BaekXiaozhi BaiRaphaelle Marie BailhacheYoshini BailungRenu BalaAlessandro BalbinoAlberto BaldisseriBartosz BalisDebjani BanerjeeZarina BanooFrancesco BarileLuca BarioglioMaria BarlouBanajit BarmanGergely Gabor BarnafoldiLee Stuart BarnbyEmilie Martine BarreauValerie Ramillien BarretLeonardo Barreto de Oliveira CamposClara BartelsKlaus BarthEsther BartschNicole BastidSumit BasuGuillaume BatigneDaniel BattistiniBoris BatyunyaDibakar BauriJose Luis Bazo AlbaIan Gardner BeardenCaitlin BeattiePascal BechtDebadatta BeheraIouri BelikovAilec Bell HechavarriaFrancesca BelliniRene BellwiedSvetlana BelokurovaLucina Gabriela Espinoza BeltranYael Antonio Vasquez BeltranGyula BencediAdel BensaoulaStefania Maria BeoleYaroslav BerdnikovAnastasia BerdnikovaLuisa BergmannMihaela Gabriela BesoiuLatchezar BetevPartha Pratim BhaduriAnju BhasinMohammad Asif BhatBuddhadeb BhattacharjeeLivio BianchiNicola BianchiJaroslav BielcikJana BielcikovaAlexandre Patrick BigotAnte BilandzicGabor BiroSaikat BiswasNicolas Luc BizeJustin Thomas BlairDmitry BlauMihail Bogdan BlidaruNora BluhmeChristoph BlumeGianluigi BocaFriederike BockTea BodovaJeongsu BokLaszlo BoldizsarMarek BombaraPeter Matthew BondGermano BonomiHerve BorelAlexander BorissovAndres Gerardo Borquez CarcamoHannah BossiElena BottaYoussef El Mard BouzianiLars BratrudPeter Braun-MunzingerMarco BregantMichal BrozGiuseppe Eugenio BrunoMatthew Daniel BucklandDmitry BudnikovHenner BueschingStefania BufalinoPaul Alois BuhlerNazar BurmasovEdith Zinhle ButheleziAleksandr BylinkinSebastian Adam BysiakJuan Carlos Cabanillas NorisMaria Fernanda Torres CabreraMengke CaiHelen Louise CainesAlberto CalivaErnesto Calvo VillarJuan Manuel Mejia CamachoPaolo CameriniFabio de Moraes CanedoSierra Lisa WeyhmillerMihai CarabasAitor Amatriain CarballoFrancesca CarnesecchiRobin Albert Andre CaronLeopoldo Abranches de CarvalhoJavier Ernesto Castillo CastellanosMatteo CastoldiFabio CatalanoSamuele CattaruzziCesar Ceballos SanchezRebecca CerriIrakli ChakaberiaPritam ChakrabortySinjini ChandraSylvain ChapelandMarielle ChartierSouvik ChattopadhaySubhasis ChattopadhyaySukalyan ChattopadhyayTiantian ChengCvetan Valeriev CheshkovVasco Miguel Chibante BarrosoDavid Dobrigkeit ChinellatoEmma Sophia ChizzaliJaeyoon ChoSoyeon ChoPeter ChochulaDhrubajyoti ChoudhuryPanagiotis ChristakoglouChristian Holm ChristensenPeter ChristiansenTatsuya ChujoMario CiaccoCorrado CicaloMichael Rudolf CiupekGiulia ClaiFabio Filippo ColamariaJonathan Samuel ColburnDomenico ColellaManuel ColocciMatteo ConcasG. 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VertesiMarta VerweijLinda VickovicZabulon VilakaziOrlando Villalobos BaillieAnna VillaniAlexander VinogradovTiziano VirgiliMaxim Mikael Olavi VirtaVytautas VislaviciusAlexander VodopyanovBenedikt VoelkelMartin Andreas VolklSergey VoloshinGiacomo VolpeBarthelemy von HallerIvan VorobyevNikita VozniukJanka VrlakovaJie WanChunzheng WangDongfang WangYuanzhe WangYubiao WangAdam Tadeusz WegrzynekFelix Thomas WeiglhoferSandro Christian WenzelJohannes Peter WesselsJens WiechulaJon WikneGrzegorz Andrzej WilkJeremy John WilkinsonGuido Alexander WillemsBernd Stefan WindelbandMichael Andreas WinnJosephina Rae WrightWenya WuYitao WuZhenjun XiongRan XuAnkur YadavArun Kumar YadavSerpil Yalcin KuzuYorito YamaguchiShiming YangSatoshi YanoEmma Rose YeatsZhongbao YinIn Kwon YooJin Hee YoonHyeonjin YuShiming YuanAlperen YuncuValentina ZaccoloChiara ZampolliMingyu ZhangFederica ZanoneNima ZardoshtiAndrey ZarochentsevPetr ZavadaNikolay ZavyalovMikhail ZhalovBiao ZhangChi ZhangLiuyao ZhangSong ZhangXiaoming ZhangYifei ZhangZhen ZhangMingrui ZhaoVladimir ZherebchevskiiZhi YuChen ZhongDaicui ZhouYou ZhouJianhui ZhuYa ZhuStefan Cristi ZugravelNicola Zurlo
• Organismes : Laboratoire de Physique de Clermont Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique Subatomique et de Cosmologie Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique de Clermont Laboratoire de Physique de Clermont Laboratoire de physique subatomique et des technologies associées Institut Pluridisciplinaire Hubert Curien Institut Pluridisciplinaire Hubert Curien Laboratoire de physique subatomique et des technologies associées Institut de Recherches sur les lois Fondamentales de l'Univers Institut de Physique des 2 Infinis de Lyon Institut de Recherches sur les lois Fondamentales de l'Univers Institut de Physique des 2 Infinis de Lyon Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de physique subatomique et des technologies associées Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique de Clermont Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique de Clermont Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique Subatomique et de Cosmologie Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de physique subatomique et des technologies associées Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut de Physique des 2 Infinis de Lyon Institut Pluridisciplinaire Hubert Curien Institut Pluridisciplinaire Hubert Curien Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de Physique de Clermont Institut Pluridisciplinaire Hubert Curien Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique de Clermont Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de physique subatomique et des technologies associées Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique de Clermont Institut de Recherches sur les lois Fondamentales de l'Univers Institut Pluridisciplinaire Hubert Curien Institut Pluridisciplinaire Hubert Curien Institut Pluridisciplinaire Hubert Curien Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de physique subatomique et des technologies associées Institut de Physique des 2 Infinis de Lyon Institut de Recherches sur les lois Fondamentales de l'Univers Institut de Recherches sur les lois Fondamentales de l'Univers
• Publié dans JHEP le 14/01/2026

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Résumé : The $p_{\rm T}$-differential production cross sections of non-prompt ${\rm D^0}$, ${\rm D^+}$, and ${\rm D_s^+}$ mesons originating from beauty-hadron decays are measured in proton$-$proton collisions at a centre-of-mass energy $\sqrt{s}$ of 13 TeV. The measurements are performed at midrapidity, $|y| < 0.5$, with the data sample collected by ALICE from 2016 to 2018. The results are in agreement with predictions from several perturbative QCD calculations. The fragmentation fraction of beauty quarks to strange mesons divided by the one to non-strange mesons, $f_{\rm{s}}/(f_{\rm{u}} + f_{\rm{d}})$, is found to be $0.114 \pm 0.016~{\rm (stat.)} \pm 0.006~{\rm (syst.)} \pm 0.003~{\rm (BR)} \pm 0.003~{\rm (extrap.)}$. This value is compatible with previous measurements at lower centre-of-mass energies and in different collision systems in agreement with the assumption of universality of fragmentation functions. In addition, the dependence of the non-prompt D meson production on the centre-of-mass energy is investigated by comparing the results obtained at $\sqrt{s} = 5.02$ and 13 TeV, showing a hardening of the non-prompt D-meson $p_{\rm T}$-differential production cross section at higher $\sqrt{s}$. Finally, the ${\rm b\overline{b}}$ production cross section per unit of rapidity at midrapidity is calculated from the non-prompt ${\rm D^0}$, ${\rm D^+}$, ${\rm D_s^+}$, and $\Lambda_{\rm c}^+$ hadron measurements, obtaining ${\rm d}\sigma/{\rm d}y = 75.2\pm 3.2~(\mathrm{stat.}) \pm 5.2~(\mathrm{syst.})^{+12.3}_{-3.2} ~(\mathrm{extrap.})\text{ } \rm \mu b \;.$

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Fichiers liés : JHEP10(2024)110.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2024
• Auteurs : Karim Abd El DayemRoberto AbuterNicolas AimarPau Amaro SeoaneAntonio AmorimJulie BeckJean Philippe BergerHenri BonnetGuillaume BourdarotWolfgang BrandnerVitor CardosoRoberto Capuzzo DolcettaYann ClénetRic DaviesTim de ZeeuwAntonia DrescherAndreas EckartFrank EisenhauerHelmut FeuchtgruberGert FingerNatascha M Förster SchreiberArianna FoschiFeng GaoPaulo GarciaÉric GendronReinhard GenzelStefan GillessenMichael HartlXavier HauboisFrank HaussmanGernot HeißelThomas HennigStefan HipplerMatthew HorrobinLieselotte JochumLaurent JocouAndreas KauferPierre KervellaSylvestre LacourVincent LapeyrèreJean B. Le BouquinPierre LénaDieter LutzFelix MangNikhil MoreThomas OttThibaut PaumardKarine PerrautGuy PerrinOliver PfuhlSebastien RabienDiogo C RibeiroMatteo Sadun BordoniSilvia ScheithauerJinyi ShangguanTaro ShimizuJulia StadlerOdele StraubChristian StraubmeierEckhard SturmLinda J TacconiIrene UrsoFrederic VincentSebastiano D von FellenbergFelix WidmannEkkehard WieprechtJulien WoillezFupeng Zhang
• Organismes : Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Institut de Planétologie et d'Astrophysique de Grenoble Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Institut de Planétologie et d'Astrophysique de Grenoble Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Institut de Planétologie et d'Astrophysique de Grenoble Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Institut de Planétologie et d'Astrophysique de Grenoble Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics
• Publié dans Astron.Astrophys. le 02/11/2025

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Résumé : Studying the orbital motion of stars around Sagittarius A* in the Galactic Center provides a unique opportunity to probe the gravitational potential near the supermassive black hole at the heart of our Galaxy. Interferometric data obtained with the GRAVITY instrument at the Very Large Telescope Interferometer (VLTI) since 2016 has allowed us to achieve unprecedented precision in tracking the orbits of these stars. GRAVITY data have been key to detecting the in-plane, prograde Schwarzschild precession of the orbit of the star S2, as predicted by General Relativity. By combining astrometric and spectroscopic data from multiple stars, including S2, S29, S38, and S55 - for which we have data around their time of pericenter passage with GRAVITY - we can now strengthen the significance of this detection to an approximately $10 \sigma$ confidence level. The prograde precession of S2's orbit provides valuable insights into the potential presence of an extended mass distribution surrounding Sagittarius A*, which could consist of a dynamically relaxed stellar cusp comprised of old stars and stellar remnants, along with a possible dark matter spike. Our analysis, based on two plausible density profiles - a power-law and a Plummer profile - constrains the enclosed mass within the orbit of S2 to be consistent with zero, establishing an upper limit of approximately $1200 \, M_\odot$ with a $1 \sigma$ confidence level. This significantly improves our constraints on the mass distribution in the Galactic Center. Our upper limit is very close to the expected value from numerical simulations for a stellar cusp in the Galactic Center, leaving little room for a significant enhancement of dark matter density near Sagittarius A*.

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Fichiers liés : aa52274-24.pdf

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Source

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2024
• Auteurs : Taylor J. BellNicolas CrouzetPatricio E. CubillosLaura KreidbergAnjali A. A. PietteMichael T. RomanJoanna K. BarstowJasmina BlecicLudmila CaroneLouis-Philippe CoulombeElsa DucrotMark HammondJoão M. MendonçaJulianne I. MosesVivien ParmentierKevin B. StevensonLucas TeinturierMichael ZhangNatalie M. BatalhaJacob L. BeanBjörn BennekeBenjamin CharnayKaty L. ChubbBrice-Olivier DemoryPeter GaoElspeth K. H. LeeMercedes López-MoralesGiuseppe MorelloEmily RauscherDavid K. SingXianyu TanOlivia VenotHannah R. WakefordKeshav AggarwalEva-Maria AhrerMunazza K. AlamRobin BaeyensDavid BarradoClaudio CaceresAarynn L. CarterSarah L. CasewellRyan C. ChallenerIan J. M. CrossfieldLeen DecinJean-Michel DésertIan Dobbs-DixonAchrène DyrekNéstor EspinozaAdina D. FeinsteinNeale P. GibsonJoseph HarringtonChristiane HellingRenyu HuNicolas IroEliza M. -R. KemptonSarah KendrewThaddeus D. KomacekJessica KrickPierre-Olivier LagageJérémy LeconteMonika LendlNeil T. LewisJoshua D. LothringerIsaac MalskyLuigi ManciniMegan MansfieldNathan J. MayneThomas M. Evans-SomaKaran MolaverdikhaniNikolay K. NikolovMatthew C. NixonEnric PalleDominique J. M. Petit Dit de la RocheCaroline PiauletDiana PowellBenjamin V. RackhamAaron D. SchneiderMaria E. SteinrueckJake TaylorLuis WelbanksSergei N. YurchenkoXi ZhangSebastian Zieba
• Organismes : Observatoire de la Côte d'Azur Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics
• Publié dans Nature Astronomy le 17/04/2023

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Résumé : Hot Jupiters are among the best-studied exoplanets, but it is still poorly understood how their chemical composition and cloud properties vary with longitude. Theoretical models predict that clouds may condense on the nightside and that molecular abundances can be driven out of equilibrium by zonal winds. Here we report a phase-resolved emission spectrum of the hot Jupiter WASP-43b measured from 5 μm to 12 μm with the JWST's Mid-Infrared Instrument. The spectra reveal a large day-night temperature contrast (with average brightness temperatures of 1,524 ± 35 K and 863 ± 23 K, respectively) and evidence for water absorption at all orbital phases. Comparisons with three-dimensional atmospheric models show that both the phase-curve shape and emission spectra strongly suggest the presence of nightside clouds that become optically thick to thermal emission at pressures greater than ~100 mbar. The dayside is consistent with a cloudless atmosphere above the mid-infrared photosphere. Contrary to expectations from equilibrium chemistry but consistent with disequilibrium kinetics models, methane is not detected on the nightside (2σ upper limit of 1-6 ppm, depending on model assumptions). Our results provide strong evidence that the atmosphere of WASP-43b is shaped by disequilibrium processes and provide new insights into the properties of the planet's nightside clouds. However, the remaining discrepancies between our observations and our predictive atmospheric models emphasize the importance of further exploring the effects of clouds and disequilibrium chemistry in numerical models.

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Fichiers liés : s41550-024-02230-x.pdf

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Source

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• Type de publi. : Ouvrage (y compris édition critique et traduction)
• Date de publi. : 01/01/2024
• Auteurs : Anne-Lise GoujonAurélien PierreVincent ArdAlebachew BelayLaurent BruxellesAmélie ChekrounSophie CorsonJean-Paul CrosPhilippe GouézinAntoine LaurentAbiyot LegesseCaroline Robion-BrunnerGetatchew SenishawTsegaye TadesseSophia ThubauvilleSophie-Jeanne Vidal
• Organismes : Institut de Recherches et d'Etudes sur les Mondes Arabes et Musulmans Centre français des études éthiopiennes [Addis-Abeba, Éthiopie] = French Center for Ethiopian Studies [Addis Ababa, Ethiopia] Musée Fenaille Travaux et recherches archéologiques sur les cultures, les espaces et les sociétés Centre français des études éthiopiennes [Addis-Abeba, Éthiopie] = French Center for Ethiopian Studies [Addis Ababa, Ethiopia] Travaux et recherches archéologiques sur les cultures, les espaces et les sociétés Institut de Recherches et d'Etudes sur les Mondes Arabes et Musulmans L'Historial de Vendée Archéologies et Sciences de l'Antiquité Travaux et recherches archéologiques sur les cultures, les espaces et les sociétés Dila University Travaux et recherches archéologiques sur les cultures, les espaces et les sociétés Frobenius Institute for Research in Cultural Anthropology, Goethe University, Frankfurt am Main, Germany & Professor, Department of Anthropology, (IPHC), Mekelle University, Mekelle, Tigray Regional State, Ethiopia.

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Résumé : Depuis près d’un siècle, plusieurs générations de chercheurs tentent de percer les secrets de ces mystérieux mégalithes. A la faveur d’une nouvelle mission archéologique française dans la région, le musée Fenaille présente pour la première fois une synthèse de ces travaux autour d’une sélection unique de stèles provenant du site de Tuto Fela. Cet héritage historique reste encore largement méconnu. Les recherches archéologiques récentes montrent le plein épanouissement de ces sociétés à mégalithes entre le VIIIe et le XVe siècle de notre ère. Aucune source écrite ne mentionne leur existence mais l’ampleur des vestiges conservés appelle à renouveler la place de ces sociétés dans l’histoire du pays et ses relations avec le royaume chrétien d’Éthiopie.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2024
• Auteurs : Shreyasi AcharyaDagmar AdamovaGianluca Aglieri RinellaLuca AgliettaMichelangelo AgnelloNeelima AgrawalZubayer AhammedShakeel AhmadSang Un AhnIshaan AhujaAlexander AkindinovValentina AkishinaMohammad Al-TuranyDmitry AleksandrovBruno AlessandroHaidar Masud AlfandaJose Ruben Alfaro MolinaBushra AliAndrea AliciNegin AlizadehvandchaliAnton AlkinJohan AlmeGiacomo AloccoTorsten AltAnna Rita AltamuraIgor AltsybeevJesus Ricardo Alvarado GarciaMustafa AnaamCristian AndreiNicodemos AndreouAnton AndronicEvgeny AndronovVenelin AnguelovFederico AntinoriPietro AntonioliNicole ApadulaL AphecetcheHarald AppelshaeuserCarolina ArataSilvia ArcelliMauro ArestiRoberta ArnaldiJhoao Gabriel Martins Campos Almeida ArneiroIonut Cristian ArseneMesut ArslandokAndre AugustinusRalf Peter AverbeckMohd Danish AzmiHitoshi BabaAngela BadalaJoonsuk BaeYongwook BaekXiaozhi BaiRaphaelle Marie BailhacheYoshini BailungRenu BalaAlessandro BalbinoAlberto BaldisseriBartosz BalisDebjani BanerjeeZarina BanooFrancesco BarileLuca BarioglioMaria BarlouBanajit BarmanGergely Gabor BarnafoldiLee Stuart BarnbyEmilie Martine BarreauValerie Ramillien BarretLeonardo Barreto de Oliveira CamposClara BartelsKlaus BarthEsther BartschNicole BastidSumit BasuGuillaume BatigneDaniel BattistiniBoris BatyunyaDibakar BauriJose Luis Bazo AlbaIan Gardner BeardenCaitlin BeattiePascal BechtDebadatta BeheraIouri BelikovAilec Bell HechavarriaFrancesca BelliniRene BellwiedSvetlana BelokurovaLucina Gabriela Espinoza BeltranYael Antonio Vasquez BeltranGyula BencediAdel BensaoulaStefania Maria BeoleYaroslav BerdnikovAnastasia BerdnikovaLuisa BergmannMihaela Gabriela BesoiuLatchezar BetevPartha Pratim BhaduriAnju BhasinMohammad Asif BhatBuddhadeb BhattacharjeeLivio BianchiNicola BianchiJaroslav BielcikJana BielcikovaAlexandre Patrick BigotAnte BilandzicGabor BiroSaikat BiswasNicolas Luc BizeJustin Thomas BlairDmitry BlauMihail Bogdan BlidaruNora BluhmeChristoph BlumeGianluigi BocaFriederike BockTea BodovaJeongsu BokLaszlo BoldizsarMarek BombaraPeter Matthew BondGermano BonomiHerve BorelAlexander BorissovAndres Gerardo Borquez CarcamoHannah BossiElena BottaYoussef El Mard BouzianiLars BratrudPeter Braun-MunzingerMarco BregantMichal BrozGiuseppe Eugenio BrunoMatthew Daniel BucklandDmitry BudnikovHenner BueschingStefania BufalinoPaul Alois BuhlerNazar BurmasovEdith Zinhle ButheleziAleksandr BylinkinSebastian Adam BysiakJuan Carlos Cabanillas NorisMaria Fernanda Torres CabreraMengke CaiHelen Louise CainesAlberto CalivaErnesto Calvo VillarJuan Manuel Mejia CamachoPaolo CameriniFabio de Moraes CanedoSierra Lisa WeyhmillerMihai CarabasAitor Amatriain CarballoFrancesca CarnesecchiRobin Albert Andre CaronLeopoldo Abranches de CarvalhoJavier Ernesto Castillo CastellanosMatteo CastoldiFabio CatalanoSamuele CattaruzziCesar Ceballos SanchezRebecca CerriIrakli ChakaberiaPritam ChakrabortySinjini ChandraSylvain ChapelandMarielle ChartierSubhasis ChattopadhyaySukalyan ChattopadhyayTiantian ChengCvetan Valeriev CheshkovVasco Miguel Chibante BarrosoDavid Dobrigkeit ChinellatoEmma Sophia ChizzaliJaeyoon ChoSoyeon ChoPeter ChochulaDhrubajyoti ChoudhuryPanagiotis ChristakoglouChristian Holm ChristensenPeter ChristiansenTatsuya ChujoMario CiaccoCorrado CicaloMichael Rudolf CiupekGiulia ClaiFabio Filippo ColamariaJonathan Samuel ColburnDomenico ColellaManuel ColocciMatteo ConcasG. Conesa BalbastreZaida Conesa del ValleGiacomo ContinJesus Guillermo Contreras NunoMaurice Louis CoquetPietro CorteseMauro Rogerio CosentinoFilippo CostaSusanna CostanzaCorentin CotJana CrkovskaPhilippe CrochetReynier Cruz TorresPengyao CuiAndrea DaineseGautam DangeMeike Charlotte DanischAndrea DanuProttay DasProttoy DasSupriya DasArchita Rani DashSadhana DashAnnalisa de CaroGiacinto de CataldoJan de CuvelandAlessandro de FalcoDaniele de GruttolaNora de MarcoChiara de MartinSalvatore de PasqualeRohaan DebRaffaele del GrandeLuigi Dello StrittoWenjing DengKyle Christian DevereauxPreeti DhankherDomenico Di BariAntonio Di MauroBatoul DiabRaul Arteche DiazThomas DietelYanchun DingJanik DitzelRoberto DiviaDhruv Utpalkumar DixitOeystein DjuvslandUliana DmitrievaAlexandru Florin DobrinBenjamin DonigusJan Michal DubinskiAndrea DublaSandeep DudiPascal DupieuxNatalia DzalaiovaTabea Maria EderRaymond James EhlersFlorian EisenhutRen EjimaDomenico EliaBarbara Ewa ErazmusFrancesca ErcolessiBruno EspagnonGiulio EulisseDavid EvansSergey EvdokimovLaura FabbiettiMattia FagginJ. FaivreFeng FanWenqing FanAlessandra FantoniMarkus FaselAlessandro FelicielloGrigorii FeofilovArturo Fernandez TellezLucas Ferrandi de OliveiraMarta Bertran FerrerAndrea FerreroChiara FerreroAlessandro FerrettiVictor Jose Gaston FeuillardVendulka FilovaDmitry FinogeevFiorella FiondaErlend FlatlandFernando Antonio FlorAmanda Nicole FloresSiegfried Valentin FoertschIlya FokinSergey FokinUmberto FolloEnrico FragiacomoEszter FrajnaUlrich FuchsNicola FunicelloChristophe FurgetArtur FursTakahiro FusayasuJens Joergen GaardhoejeMartino GagliardiAlberto Martin Gago MedinaTanu GahlautCarlos Duarte GalvanDhevan Raja GangadharanParaskevi GanotiJose Maria Garabatos CuadradoTonatiuh Garcia ChavezEdmundo Javier Garcia-SolisCorrado GargiuloPiotr Jan GasikHari Mohan GaurAmrit GautamMaria Beatriz de Leone GayMarie GermainAbderrahmane GhimouzChandrasekhar GhoshMarco GiacaloneGiulia GioachinPaolo GiubellinoPiero GiubilatoAude Marie Camille GlaenzerPeter GlasselEwa GlimosDaniel Jia Qin GohVictor Luis Gonzalez SebastianPavel GordeevMarek Boguslaw GorgonKangkan GoswamiSven GotovacVarlen GrabskiLukasz Kamil GraczykowskiEkaterina GreckaAlessandro GrelliCostin GrigorasVladislav GrigoryevSmbat GrigoryanFabrizio GrosaJan Fiete Grosse-OetringhausRaffaele GrossoDavid GrundNadine Alice GruenwaldGabriel Garcia GuardianoRachid GuernaneMaxime Rene Joseph GuilbaudKristjan Herlache GulbrandsenTuba GundemTaku GunjiWenda GuoAnik GuptaRamni GuptaRashi GuptaKatarzyna GwizdzielLaszlo GyulaiCynthia Marie HadjidakisFakhar Ul HaiderSara HaidlovaMintu HaldarHideki HamagakiAbdennacer HamdiYounghoon HanBrian Gerald HanleyRyan Patrick HanniganJoachim HansenJohn William HarrisAustin Vincent HartonMichael Volker HartungHadi HassanDespina HatzifotiadouPhilip HauerLaura Brittany HavenerErnst HellbarHaavard HelstrupMarvin HemmerTomas HermanSabrina Gabrielle HernandezGerardo Antonio Herrera CorralFlorian HerrmannSarah Nina Edwige HerrmannKristin Fanebust HetlandBenedict HeybeckHartmut HillemannsBoris HippolyteFelix Willi HoffmannBas HofmanGeun Hee HongMaximilian HorstAdrian HorzykYongzhen HouPeter Zahariev HristovPatrick HuhnLaura Maria HuhtaThomas HumanicAlek HutsonDirk HutterMinyoung Chris HwangRadiy IlkaevHira IlyasMotoi InabaGian Michele InnocentiMikhail IppolitovArtem IsakovTommaso IsidoriMd Samsul IslamMarian IvanovMarian IvanovVladimir IvanovKaare Endrup IversenMiroslaw JablonskiBarbara JacakNicolo JacazioPeter Martin JacobsSlavka JadlovskaJan JadlovskySyaefudin JaelaniCristiane JahnkeMonika Joanna JakubowskaMalgorzata Anna JanikThomas JansonSu-Jeong JiShihai JiaAlom Antonio Paz JimenezFlorian JonasDaniel Matthew JonesJohn JowettJerome JungMichael JungAntoine Jean-Simon JuniqueAnton JuskoJetnipit KaewjaiPeter KalinakAlexander Philipp KalweitYuki KamiyaDavid KaratovicOleg KaravichevTatiana KaravichevaEvgeny KarpechevMaja Jadwiga KarwowskaUdo Wolfgang KebschullRalf KeidelDarius KeijdenerMarkus KeilBernhard Franz KetzerSwapnesh Santosh KhadeAhsan Mehmood KhanShaista KhanAlexei KhanzadeevYury KharlovAnisa KhatunArvind KhuntiaZhanna KhuranovaBjarte KilengBeomkyu KimChong KimDong Jo KimEun Joo KimJaehyun KimJiyoung KimJunlee KimMinjung KimSe Yong KimTaejun KimKento KimuraAleksandrina KirkovaStefan KirschIvan KiselSergey KiselevAdam Ryszard KisielJacek Pawel KitowskiJennifer Lynn KlayJochen KleinSpencer Robert KleinChristian Klein-BoesingMatthias KleinerThomas KlemenzAlexander KlugeChinorat KobdajThorsten Sven KolleggerAndrey KondratyevNatalia KondratyevaJoshua Leon KonigStephan Alexander KonigstorferPiotr Jan KonopkaGeorgui Kornakov VanMaximilian KorwieserSebastian Dominik KoryciakArtem KotliarovNino KovacicVladimir KovalenkoMarek KowalskiVenelin Valeriev KozhuharovIvan KralikAdela KravcakovaLubos KrcalMarian KrivdaFilip KrizekKatarina Krizkova GajdosovaCristiano KrugMario KrugerDiana Maria KrupovaEvgeny KryshenVit KuceraChristian Claude KuhnPaulus Gerardus KuijerTakuya KumaokaDeekshit KumarLokesh KumarNavneet KumarShyam KumarSourav KunduPodist KurashviliAlexander KurepinAlexey KurepinAlexey KuryakinSvetlana KushpilVladislav KuskovMonika KutylaMin Jung KweonYoungil KwonSarah Louise La PointePaola La RoccaAnantachai LakrathokMassimo LamannaAimeric Robin LandouRune LangoyPavel LarionovElisa LaudiLukas LautnerRafael Angel Narcio LaveagaRoman LavickaRamona LeaHyungjun LeeIosif-Charles LegrandGauthier LegrasJohannes LehrbachTomasz Marcin LelekRoy Crawford LemmonIldefonso Leon MonzonMarcel Markus LeschEzra Douglas LesserPeter LevaiXiaomei LiBeatrice Eva Liang-GilmanJorgen Andre LienRoman LietavaIris LikmetaBong-Hwi LimSanghoon LimVolker LindenstruthAmelia LindnerChristian LippmannDonghai LiuJian LiuGianni Shigeru Setoue LiveraroIngrid Mckibben LofnesConstantinos LoizidesSandor LokosJohanna LomkerPetra LoncarXavier Bernard LopezErnesto Lopez TorresPengzhong LuFabiola Viridiana LugoJens Robert LuhderMarcello LunardonGrazia LuparelloYugang MaMagnus MagerAntonin MaireEmilia Maria MajerzMartin Vasilev MakarievMikhail MalaevGiovanni 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• Organismes : Laboratoire de Physique de Clermont Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique Subatomique et de Cosmologie Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique de Clermont Laboratoire de Physique de Clermont Laboratoire de physique subatomique et des technologies associées Institut Pluridisciplinaire Hubert Curien Institut Pluridisciplinaire Hubert Curien Laboratoire de physique subatomique et des technologies associées Institut de Recherches sur les lois Fondamentales de l'Univers Institut de Physique des 2 Infinis de Lyon Institut de Recherches sur les lois Fondamentales de l'Univers Institut de Physique des 2 Infinis de Lyon Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de physique subatomique et des technologies associées Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique de Clermont Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique de Clermont Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique Subatomique et de Cosmologie Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de physique subatomique et des technologies associées Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut de Physique des 2 Infinis de Lyon Institut Pluridisciplinaire Hubert Curien Institut Pluridisciplinaire Hubert Curien Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de Physique de Clermont Institut Pluridisciplinaire Hubert Curien Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique de Clermont Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de physique subatomique et des technologies associées Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique de Clermont Institut de Recherches sur les lois Fondamentales de l'Univers Institut Pluridisciplinaire Hubert Curien Institut Pluridisciplinaire Hubert Curien Institut Pluridisciplinaire Hubert Curien Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de physique subatomique et des technologies associées Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Laboratoire de physique subatomique et des technologies associées Institut de Physique des 2 Infinis de Lyon Institut de Recherches sur les lois Fondamentales de l'Univers Institut de Recherches sur les lois Fondamentales de l'Univers
• Publié dans Phys.Rev.D le 05/03/2026

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Résumé : The two-particle momentum correlation functions between charm mesons ($\mathrm{D^{*\pm}}$ and $\mathrm{D}^\pm$) and charged light-flavor mesons ($\pi^{\pm}$ and K$^{\pm}$) in all charge-combinations are measured for the first time by the ALICE Collaboration in high-multiplicity proton-proton collisions at a center-of-mass energy of $\sqrt{s} =13$ TeV. For $\mathrm{DK}$ and $\mathrm{D^*K}$ pairs, the experimental results are in agreement with theoretical predictions of the residual strong interaction based on quantum chromodynamics calculations on the lattice and chiral effective field theory. In the case of $\mathrm{D}\pi$ and $\mathrm{D^*}\pi$ pairs, tension between the calculations including strong interactions and the measurement is observed. For all particle pairs, the data can be adequately described by Coulomb interaction only, indicating a shallow interaction between charm and light-flavor mesons. Finally, the scattering lengths governing the residual strong interaction of the $\mathrm{D}\pi$ and $\mathrm{D^*}\pi$ systems are determined by fitting the experimental correlation functions with a model that employs a Gaussian potential. The extracted values are small and compatible with zero.

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Fichiers liés : 2401.13541v3.pdf

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