Diego SANCHEZ

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2023
• Auteurs : Shreyasi AcharyaDagmar AdamovaAlexander AdlerGianluca Aglieri RinellaMichelangelo AgnelloNeelima AgrawalZubayer AhammedShakeel AhmadSang Un AhnIshaan AhujaAlexander AkindinovMohammad Al-TuranyDmitry AleksandrovBruno AlessandroHaidar Masud AlfandaJose Ruben Alfaro MolinaBushra AliYasir AliAndrea AliciNegin AlizadehvandchaliAnton AlkinJohan AlmeGiacomo AloccoTorsten AltIgor AltsybeevMustafa AnaamCristian AndreiAnton AndronicVenelin AnguelovFederico AntinoriPietro AntonioliAnuj ChandraNicole ApadulaLaurent AphecetcheHarald AppelshaeuserCarolina ArataSilvia ArcelliRoberta ArnaldiIonut Cristian ArseneMesut ArslandokAndre AugustinusRalf Peter AverbeckSizar AzizMohd Danish AzmiAngela BadalaYongwook BaekXiaozhi BaiRaphaelle Marie BailhacheYoshini BailungRenu BalaAlessandro BalbinoAlberto BaldisseriBartosz BalisDebjani BanerjeeZarina BanooRoberto BarberaLuca BarioglioMaria BarlouGergely Gabor BarnafoldiLee Stuart BarnbyValerie Ramillien BarretLeonardo Barreto de Oliveira CamposClara BartelsKlaus BarthEsther BartschFilippo BaruffaldiNicole BastidSumit BasuGuillaume BatigneDaniel BattistiniBoris BatyunyaDibakar BauriJose Luis Bazo AlbaIan Gardner BeardenCaitlin BeattiePascal BechtDebadatta BeheraIouri BelikovAilec Bell HechavarriaFrancesca BelliniRene BellwiedSvetlana BelokurovaVladimir BelyaevGyula BencediStefania Maria BeoleAlexandru BercuciYaroslav BerdnikovAnastasia BerdnikovaLuisa BergmannMihaela Gabriela BesoiuLatchezar BetevPartha Pratim BhaduriAnju BhasinMohammad Asif BhatBuddhadeb BhattacharjeeLivio BianchiNicola BianchiJaroslav BielcikJana BielcikovaJacek Bogumil BiernatAlexandre Patrick BigotAnte BilandzicGabor BiroSaikat BiswasNicolas Luc BizeJustin Thomas BlairDmitry BlauMihail Bogdan BlidaruNora BluhmeChristoph BlumeGianluigi BocaFriederike BockTea BodovaAlexey BogdanovStefano BoiJeongsu BokLaszlo BoldizsarAlexander BolozdynyaMarek BombaraPeter Matthew BondGermano BonomiHerve BorelAlexander BorissovHannah BossiElena BottaLars BratrudPeter Braun-MunzingerMarco BregantMichal BrozGiuseppe Eugenio BrunoMatthew Daniel BucklandDmitry BudnikovHenner BueschingStefania BufalinoOphelie BugnonPaul Alois BuhlerEdith Zinhle ButheleziJamila Bashir ButtAleksandr BylinkinSebastian Adam BysiakMengke CaiHelen Louise CainesAlberto CalivaErnesto Calvo VillarJuan Manuel Mejia CamachoPaolo CameriniFabio de Moraes CanedoMihai CarabasFrancesca CarnesecchiRobin Albert Andre CaronJavier Ernesto Castillo CastellanosFabio CatalanoCesar Ceballos SanchezIrakli ChakaberiaPritam ChakrabortySinjini ChandraSylvain ChapelandMarielle ChartierSubhasis ChattopadhyaySukalyan ChattopadhyayTonatiuh Garcia ChavezTiantian ChengCvetan Valeriev CheshkovBrigitte CheynisVasco Miguel Chibante BarrosoDavid Dobrigkeit ChinellatoEmma Sophia ChizzaliJaeyoon ChoSoyeon ChoPeter ChochulaPanagiotis ChristakoglouChristian Holm ChristensenPeter ChristiansenTatsuya ChujoMario CiaccoCorrado CicaloLuisa CifarelliFederico CindoloMichael Rudolf CiupekGiulia ClaiFabio Filippo ColamariaJonathan Samuel ColburnDomenico ColellaAlberto ColluManuel ColocciMatteo ConcasG. 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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 Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut de Recherches sur les lois Fondamentales de l'Univers 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 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 Physique des 2 Infinis de Lyon Institut de Physique des 2 Infinis de Lyon Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique de Clermont Institut de Physique des 2 Infinis de Lyon 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 Institut Pluridisciplinaire Hubert Curien Laboratoire de physique subatomique et des technologies associées 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 Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut Pluridisciplinaire Hubert Curien Laboratoire de Physique de Clermont Institut Pluridisciplinaire Hubert Curien Laboratoire de Physique de Clermont 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 de Recherches sur les lois Fondamentales de l'Univers Institut de Recherches sur les lois Fondamentales de l'Univers 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 Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de physique subatomique et des technologies associées 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 de Clermont Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut de Physique des 2 Infinis de Lyon Institut de Recherches sur les lois Fondamentales de l'Univers
• Publié dans Phys.Lett.B le 31/10/2025

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Résumé : Fluctuation measurements are important sources of information on the mechanism of particle production at LHC energies. This article reports the first experimental results on third-order cumulants of the net-proton distributions in Pb–Pb collisions at a center-of-mass energy sNN=5.02 TeV recorded by the ALICE detector. The results on the second-order cumulants of net-proton distributions at sNN=2.76 and 5.02 TeV are also discussed in view of effects due to the global and local baryon number conservation. The results demonstrate the presence of long-range rapidity correlations between protons and antiprotons. Such correlations originate from the early phase of the collision. The experimental results are compared with HIJING and EPOS model calculations, and the dependence of the fluctuation measurements on the phase-space coverage is examined in the context of lattice quantum chromodynamics (LQCD) and hadron resonance gas (HRG) model estimations. The measured third-order cumulants are consistent with zero within experimental uncertainties of about 4% and are described well by LQCD and HRG predictions.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2023
• Auteurs : Shreyasi AcharyaDagmar AdamovaAlexander AdlerGianluca Aglieri RinellaMichelangelo AgnelloNeelima AgrawalZubayer AhammedShakeel AhmadSang Un AhnIshaan AhujaAlexander AkindinovMohammad Al-TuranyDmitry AleksandrovBruno AlessandroHaidar Masud AlfandaJose Ruben Alfaro MolinaBushra AliAndrea AliciNegin AlizadehvandchaliAnton AlkinJohan AlmeGiacomo AloccoTorsten AltIgor AltsybeevMustafa AnaamCristian AndreiAnton AndronicVenelin AnguelovFederico AntinoriPietro AntonioliNicole ApadulaLaurent AphecetcheHarald AppelshaeuserCarolina ArataSilvia ArcelliMauro ArestiRoberta ArnaldiJhoao Gabriel Martins Campos Almeida ArneiroIonut Cristian ArseneMesut ArslandokAndre AugustinusRalf Peter AverbeckMohd Danish AzmiAngela BadalaJoonsuk BaeYongwook BaekXiaozhi BaiRaphaelle Marie BailhacheYoshini BailungAlessandro BalbinoAlberto BaldisseriBartosz BalisDebjani BanerjeeZarina BanooRoberto BarberaFrancesco BarileLuca BarioglioMaria BarlouGergely Gabor BarnafoldiLee Stuart BarnbyValerie 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 BelokurovaVladimir BelyaevGyula BencediStefania Maria BeoleAlexandru BercuciYaroslav BerdnikovAnastasia BerdnikovaLuisa BergmannMihaela Gabriela BesoiuLatchezar BetevPartha Pratim BhaduriAnju BhasinMohammad Asif BhatBuddhadeb BhattacharjeeLivio BianchiNicola BianchiJaroslav BielcikJana BielcikovaJacek Bogumil BiernatAlexandre Patrick BigotAnte BilandzicGabor BiroSaikat BiswasNicolas Luc BizeJustin Thomas BlairDmitry BlauMihail Bogdan BlidaruNora BluhmeChristoph BlumeGianluigi BocaFriederike BockTea BodovaAlexey BogdanovStefano BoiJeongsu 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 BufalinoOphelie BugnonPaul Alois BuhlerEdith Zinhle ButheleziSebastian Adam BysiakMengke CaiHelen Louise CainesAlberto CalivaErnesto Calvo VillarJuan Manuel Mejia CamachoPaolo CameriniFabio de Moraes CanedoMihai CarabasAitor Amatriain CarballoFrancesca CarnesecchiRobin Albert Andre CaronLeopoldo Abranches de CarvalhoJavier Ernesto Castillo CastellanosFabio CatalanoCesar Ceballos SanchezIrakli ChakaberiaPritam ChakrabortySinjini ChandraSylvain ChapelandMarielle ChartierSubhasis ChattopadhyaySukalyan ChattopadhyayTonatiuh Garcia ChavezTiantian ChengCvetan Valeriev CheshkovBrigitte CheynisVasco Miguel Chibante BarrosoDavid Dobrigkeit ChinellatoEmma Sophia ChizzaliJaeyoon ChoSoyeon ChoPeter ChochulaPanagiotis ChristakoglouChristian Holm ChristensenPeter ChristiansenTatsuya ChujoMario CiaccoCorrado CicaloFederico CindoloMichael Rudolf CiupekGiulia ClaiFabio Filippo ColamariaJonathan Samuel ColburnDomenico ColellaManuel ColocciMatteo ConcasG. Conesa BalbastreZaida Conesa del ValleGiacomo ContinJesus Guillermo Contreras NunoMaurice Louis CoquetThomas Michael CormierPietro CorteseMauro Rogerio CosentinoFilippo CostaSusanna CostanzaCorentin CotJana CrkovskaPhilippe CrochetReynier Cruz TorresEleazar Cuautle FloresPengyao CuiAndrea DaineseMeike Charlotte DanischAndrea DanuProttay DasProttoy DasSupriya DasArchita Rani DashSadhana DashHector David Regules MedelAnnalisa de CaroGiacinto de CataldoJan de CuvelandAlessandro de FalcoDaniele de GruttolaNora de MarcoChiara de MartinSalvatore de PasqualeSuman DebRoman Jan DebskiKamil Rafal DejaRaffaele del GrandeLuigi Dello StrittoWenjing DengPreeti DhankherDomenico Di BariAntonio Di MauroRaul Arteche DiazThomas DietelYanchun DingRoberto DiviaDhruv Utpalkumar DixitOeystein DjuvslandUliana DmitrievaAlexandru Florin DobrinBenjamin DonigusJan Michal DubinskiAndrea DublaSandeep DudiPascal DupieuxMartin DurkacNatalia DzalaiovaTabea Maria EderRaymond James EhlersViljar Nilsen EikelandFlorian 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GermainAbderrahmane GhimouzChandrasekhar GhoshMarco GiacalonePaolo GiubellinoPiero GiubilatoAude Marie Camille GlaenzerPeter GlasselEwa GlimosDaniel Jia Qin GohVictor Luis Gonzalez SebastianLaura Helena Gonzalez TruebaMarek Boguslaw GorgonSven GotovacVarlen GrabskiLukasz Kamil GraczykowskiEkaterina GreckaAlessandro GrelliCostin GrigorasVladislav GrigoryevSmbat GrigoryanFabrizio GrosaJan Fiete Grosse-OetringhausRaffaele GrossoDavid GrundGabriel Garcia GuardianoRachid GuernaneMaxime Rene Joseph GuilbaudKristjan Herlache GulbrandsenTuba GundemTaku GunjiWenda GuoAnik GuptaRamni GuptaSergio Paisano GuzmanLaszlo GyulaiMichael Karim HabibCynthia Marie HadjidakisFakhar Ul HaiderHideki HamagakiAbdennacer HamdiMohammed HamidYounghoon HanRyan Patrick HanniganMd Rihan HaqueJohn William HarrisAustin Vincent HartonHadi HassanDespina HatzifotiadouPhilip HauerLaura Brittany HavenerStefan Thomas HeckelErnst HellbarHaavard HelstrupMarvin HemmerTomas HermanGerardo Antonio Herrera CorralFlorian 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LunardonGrazia LuparelloYugang MaAlla MaevskayaMagnus MagerTariq MahmoudAntonin MaireMartin Vasilev MakarievMikhail MalaevGiovanni MalfattoreNasir Mehdi MalikQasim Waheed MalikSalman Khurshid MalikLiudmila MalininaDmitry Mal KevichDukhishyam MallickNeelkamal MallickGiuseppe MandaglioSushobhan Kumar MandalVladislav MankoFranck MansoVito ManzariYaxian MaoGiacomo Vito MargagliottiAnselmo MargottiAna Maria MarinChristina MarkertPaolo MartinengoJacobb Lee MartinezMario Ivan Martinez HernandezGines Martinez-GarciaSilvia MasciocchiMassimo MaseraAlberto MasoniLaure Marie MassacrierAnnalisa MastroserioOliver MatonohaPaula Fernanda Toledo MatuokaAdam Tomasz MatyjaChristoph MayerAntonio Lafuente MazuecosFrancesco MazzaschiMarianna MazzilliJoyful Elma MdhluliAdrian Florin MechlerYury MelikyanArturo Alejandro Menchaca-RochaElisa MeninnoAnjaly Sasikumar MenonMichal MeresSibaliso MhlangaYasuo MiakeLuca MichelettiLucrezia Camilla MigliorinDimitar Lubomirov MihaylovKonstantin MikhaylovAditya Nath 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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 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 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 Physique des 2 Infinis de Lyon Institut de Physique des 2 Infinis de Lyon Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie 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 Physique des 2 Infinis de Lyon 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 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 Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut Pluridisciplinaire Hubert Curien Laboratoire de Physique de Clermont Institut Pluridisciplinaire Hubert Curien Laboratoire de Physique de Clermont 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 de Recherches sur les lois Fondamentales de l'Univers 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 Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de physique subatomique et des technologies associées 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 de Clermont Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut de Physique des 2 Infinis de Lyon Institut de Recherches sur les lois Fondamentales de l'Univers
• Publié dans Phys.Lett.B le 31/10/2025

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Résumé : This letter reports the first measurement of spin alignment, with respect to the helicity axis, for D⁎+ vector mesons and their charge conjugates from charm-quark hadronisation (prompt) and from beauty-meson decays (non-prompt) in hadron collisions. The measurements were performed at midrapidity (|y|<0.8) as a function of transverse momentum (pT) in proton–proton (pp) collisions collected by ALICE at the centre-of-mass energy s=13TeV. The diagonal spin density matrix element ρ00 of D⁎+ mesons was measured from the angular distribution of the D⁎+→D0(→K−π+)π+ decay products, in the D⁎+ rest frame, with respect to the D⁎+ momentum direction in the pp centre of mass frame. The ρ00 value for prompt D⁎+ mesons is consistent with 1/3, which implies no spin alignment. However, for non-prompt D⁎+ mesons an evidence of ρ00 larger than 1/3 is found. The measured value of the spin density element is ρ00=0.455±0.022(stat.)±0.035(syst.) in the 5<pT<20GeV/c interval, which is consistent with a Pythia 8 Monte Carlo simulation coupled with the EvtGen package, which implements the helicity conservation in the decay of D⁎+ meson from beauty mesons. In non-central heavy-ion collisions, the spin of the D⁎+ mesons may be globally aligned with the direction of the initial angular momentum and magnetic field. Based on the results for pp collisions reported in this letter it is shown that alignment of non-prompt D⁎+ mesons due to the helicity conservation coupled to the collective anisotropic expansion may mimic the signal of global spin alignment in heavy-ion collisions.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2023
• Auteurs : Shreyasi AcharyaDagmar AdamovaAlexander AdlerGianluca Aglieri RinellaMichelangelo AgnelloNeelima AgrawalZubayer AhammedShakeel AhmadSang Un AhnIshaan AhujaAlexander AkindinovMohammad Al-TuranyDmitry AleksandrovBruno AlessandroHaidar Mas'Ud AlfandaJose Ruben Alfaro MolinaBushra AliYasir AliAndrea AliciNegin AlizadehvandchaliAnton AlkinJohan AlmeGiacomo AloccoTorsten AltIgor AltsybeevMustafa AnaamCristian AndreiAnton AndronicVenelin AnguelovFederico AntinoriPietro AntonioliAnuj ChandraNicole ApadulaLaurent AphecetcheHarald AppelshaeuserSilvia ArcelliRoberta ArnaldiIonut Cristian ArseneMesut ArslandokAndre AugustinusRalf Peter AverbeckSizar AzizMohd Danish AzmiAngela BadalaYongwook BaekXiaozhi BaiRaphaelle Marie BailhacheYoshini BailungRenu BalaAlessandro BalbinoAlberto BaldisseriBartosz BalisDebjani BanerjeeZarina BanooRoberto BarberaLuca BarioglioMaria BarlouGergely Gabor BarnafoldiLee Stuart BarnbyValerie Ramillien BarretLeonardo Barreto de Oliveira CamposClara BartelsKlaus BarthEsther BartschFilippo BaruffaldiNicole BastidSumit BasuGuillaume BatigneDaniel BattistiniBoris BatyunyaDibakar BauriJose Luis Bazo AlbaIan Gardner BeardenCaitlin BeattiePascal BechtDebadatta BeheraIouri BelikovAilec Bell HechavarriaFrancesca BelliniRene BellwiedSvetlana BelokurovaVladimir BelyaevGyula BencediStefania Maria BeoleAlexandru BercuciYaroslav BerdnikovAnastasia BerdnikovaLuisa BergmannMihaela Gabriela BesoiuLatchezar BetevPartha Pratim BhaduriAnju BhasinInayat Rasool BhatMohammad Asif BhatBuddhadeb BhattacharjeeLivio BianchiNicola BianchiJaroslav BielcikJana BielcikovaJacek Bogumil BiernatAnte BilandzicGabor BiroSaikat BiswasJustin Thomas BlairDmitry BlauMihail Bogdan BlidaruNora BluhmeChristoph BlumeGianluigi BocaFriederike BockTea BodovaAlexey BogdanovStefano BoiJeongsu BokLaszlo BoldizsarAlexander BolozdynyaMarek BombaraPeter Matthew BondGermano BonomiHerve BorelAlexander BorissovHannah BossiElena BottaLars BratrudPeter Braun-MunzingerMarco BregantMichal BrozGiuseppe Eugenio BrunoMatthew Daniel BucklandDmitry BudnikovHenner BueschingStefania BufalinoOphelie BugnonPaul Alois BuhlerEdith Zinhle ButheleziJamila Bashir ButtAleksandr BylinkinSebastian Adam BysiakMengke CaiHelen Louise CainesAlberto CalivaErnesto Calvo VillarJuan Manuel Mejia CamachoRabi Soto CamachoPaolo CameriniFabio de Moraes CanedoMihai CarabasFrancesca CarnesecchiRobin Albert Andre CaronJavier Ernesto Castillo CastellanosFabio CatalanoCesar Ceballos SanchezIrakli ChakaberiaPritam ChakrabortySinjini ChandraSylvain ChapelandMarielle ChartierSubhasis ChattopadhyaySukalyan ChattopadhyayTonatiuh Garcia ChavezTiantian ChengCvetan Valeriev CheshkovBrigitte CheynisVasco Miguel Chibante BarrosoDavid Dobrigkeit ChinellatoEmma Sophia ChizzaliJaeyoon ChoSoyeon ChoPeter ChochulaPanagiotis ChristakoglouChristian Holm ChristensenPeter ChristiansenTatsuya ChujoMario CiaccoCorrado CicaloLuisa CifarelliFederico CindoloMichael Rudolf CiupekGiulia ClaiFabio Filippo ColamariaJonathan Samuel ColburnDomenico ColellaAlberto ColluManuel ColocciMatteo ConcasG. Conesa BalbastreZaida Conesa del ValleGiacomo ContinJesus Guillermo Contreras NunoMaurice Louis CoquetThomas Michael CormierPietro CorteseMauro Rogerio CosentinoFilippo CostaSusanna CostanzaPhilippe CrochetReynier Cruz TorresEleazar Cuautle FloresPengyao CuiLeticia Cunqueiro MendezAndrea DaineseMeike Charlotte DanischAndrea DanuProttay DasProttoy DasSupriya DasSadhana DashHector David Regules MedelAnnalisa de CaroGiacinto de CataldoLorenzo de CilladiJan de CuvelandAlessandro de FalcoDaniele de GruttolaNora de MarcoChiara de MartinSalvatore de PasqualeSuman DebHermann Franz DegenhardtKamil Rafal DejaRaffaele del GrandeLuigi Dello StrittoWenjing DengPreeti DhankherDomenico Di BariAntonio Di MauroRaul Arteche DiazThomas DietelYanchun DingRoberto DiviaDhruv Utpalkumar DixitOeystein DjuvslandUliana DmitrievaAlexandru Florin DobrinBenjamin DonigusAnand Kumar DubeyJan Michal DubinskiAndrea DublaSandeep DudiPascal DupieuxMartin DurkacNatalia DzalaiovaTabea Maria EderRaymond James EhlersViljar 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GermainSanjay Kumar GhoshMarco GiacalonePaola GianottiPaolo GiubellinoPiero GiubilatoAude Marie Camille GlaenzerPeter GlasselEwa GlimosDaniel Jia Qin GohVictor Luis Gonzalez SebastianLaura Helena Gonzalez TruebaSergey GorbunovMarek Boguslaw GorgonLidia Maria GorlichSven GotovacVarlen GrabskiLukasz Kamil GraczykowskiEkaterina GreckaLeo Clifford GreinerAlessandro GrelliCostin GrigorasVladislav GrigoryevSmbat GrigoryanFabrizio GrosaJan Fiete Grosse-OetringhausRaffaele GrossoDavid GrundGabriel Garcia GuardianoRachid GuernaneMaxime Rene Joseph GuilbaudKristjan Herlache GulbrandsenTaku GunjiWenda GuoAnik GuptaRamni GuptaSergio Paisano GuzmanLaszlo GyulaiMichael Karim HabibCynthia Marie HadjidakisHideki HamagakiMohammed HamidYounghoon HanRyan Patrick HanniganMd Rihan HaqueAlena GromadaJohn William HarrisAustin Vincent HartonJan Anton HasenbichlerHadi HassanDespina HatzifotiadouPhilip HauerLaura Brittany HavenerStefan Thomas HeckelErnst HellbarHaavard HelstrupTomas HermanGerardo Antonio 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MahmoudAntonin MaireMikhail MalaevNasir Mehdi MalikQasim Waheed MalikSalman Khurshid MalikLiudmila MalininaDmitry Mal KevichDukhishyam MallickNeelkamal MallickGiuseppe MandaglioVladislav MankoFranck MansoVito ManzariYaxian MaoGiacomo Vito MargagliottiAnselmo MargottiAna Maria MarinChristina MarkertMarco MarquardNicole Alice MartinPaolo MartinengoJacobb Lee MartinezMario Ivan Martinez HernandezGines Martinez-GarciaSilvia MasciocchiMassimo MaseraAlberto MasoniLaure Marie MassacrierAnnalisa MastroserioAndreas Michael MathisOliver MatonohaPaula Fernanda Toledo MatuokaAdam Tomasz MatyjaChristoph MayerAntonio Lafuente MazuecosFrancesco MazzaschiMarianna MazzilliJoyful Elma MdhluliAdrian Florin MechlerYury MelikyanArturo Alejandro Menchaca-RochaElisa MeninnoAnjaly Sasikumar MenonMichal MeresSibaliso MhlangaYasuo MiakeLuca MichelettiLucrezia Camilla MigliorinDimitar Lubomirov MihaylovKonstantin MikhaylovAditya Nath MishraDariusz Czeslaw MiskowiecAbhi ModakAuro Prasad MohantyBedangadas 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Jefferson PorterValeriy PozdniakovSidharth Kumar PrasadSuraj PrasadRoberto PreghenellaFrancesco PrinoClaude Andre PruneauIgor PshenichnovMaximiliano PuccioShi QiuLuca QuagliaRaquel Estefania Quishpe QuishpeSimone RagoniAndry Malala RakotozafindrabeLuciano RamelloFouad RamiSaul Anibal Rodriguez RamirezThibaut Albert RancienRashmi RaniwalaSudhir RaniwalaSami Sakari RasanenRutuparna RathIvan RavasengaKenneth Francis ReadAndreas Ralph RedelbachKrzysztof RedlichAttiq Ur RehmanPatrick Simon ReicheltFelix ReidtHaakon Andre Reme-NessZuzana JakubcinovaKlaus Johannes ReygersAndrei RiabovViktor RiabovRiccardo RicciTuva Ora Herenui RichertMatthias Rudolph RichterWerner RieglerFrancesco RiggiCatalin-Lucian RisteaMario Rodriguez CahuantziKetil RoeedRoman RogalevElena RogochayaTim Sebastian RogoschinskiDavid Michael RohrDieter RoehrichPablo Fierro RojasSolangel Rojas TorresPrzemyslaw Stefan RokitaFederico RonchettiAntonina RosanoEdgar Dominguez RosasAndrea RossiAnkhi RoyPradip Kumar RoySubhadeep RoyNicola RubiniOmar Vazquez RuedaDaniela RuggianoRinaldo RuiBoris RumyantsevPawel Grzegorz RussekRoberto RussoAnar RustamovEvgeny RyabinkinYury RyabovAndrzej RybickiHeidi Maria RytkonenWioleta RzesaOskari Antti Matti SaarimakiRita SadekSergey SadovskiyJon-Are SaetreKarel SafarikSumit Kumar SahaSwati SahaBaidyanath SahooPragati SahooRaghunath SahooSarita SahooDushmanta SahuPradip Kumar SahuJogender SainiKlaudia TroppShingo SakaiMalavika Panikkassery SalvanSanjeev Singh SambyalThiago Badaro SaramelaDebojit SarkarNachiketa SarkarPranjal SarmaValerio SarritzuValentina Mantovani SartiMike SasJohann Joachim SchambachHorst Sebastian ScheidClaudiu Cornel SchiauaRainer Martin SchickerAlexander SchmahChristian Joachim SchmidtHans Rudolf SchmidtMarten Ole SchmidtMartin SchmidtNicolas SchmidtAustin Robert SchmierRomain SchotterJurgen SchukraftKilian Eberhard SchwarzKai Oliver SchwedaGilda ScioliEnrico ScomparinJanet Elizabeth SegerYuko SekiguchiDaiki SekihataIlya SelyuzhenkovSerhiy SenyukovJin Joo SeoDmitry SerebryakovLaura SerksnyteAdrian SevcencoTebogo Joyce ShabaArseniy ShabanovAlexandre ShabetaiRuben ShahoyanWadut ShaikhArtem ShangaraevAnjali SharmaDeependra SharmaHimanshu SharmaMeenakshi SharmaNatasha SharmaSheetal SharmaUpasana SharmaAfnan ShatatOveis SheibaniKenta ShigakiMaya Hachiya ShimomuraSergey ShirinkinQiye ShouYury SibiryakSabyasachi SiddhantaTeodor SiemiarczukTiago Fiorini da SilvaDavid Olle Rickard SilvermyrTawanchat SimantathammakulRadoslav SimeonovGiuseppe SimonettiBalwan SinghBhawani SinghRanbir SinghRandhir SinghRavindra SinghVivek SinghVikas SinghalTinku Sarkar - SinhaBranislav SitarMario SittaBernhard SkaaliGeorgijs SkorodumovsMaciej SlupeckiNikolai SmirnovRaimond SnellingsEmilie Haugland SolheimCarlos Soncco MezaJihye SongArnon SongmoolnakFrancesca SoramelSoren Pontoppidan SorensenRik SpijkersIwona Anna SputowskaJoey StaaJohanna StachelIonel StanPatrick John SteffanicStephan Friedrich StiefelmaierDiego StoccoIda StorehaugMaksim Melnik StoretvedtPeter StratmannSofia StrazziChristos Pliatskas StylianidisAlexandre Alarcon Do Passo SuaideChristophe Pierre SuireMikhail SukhanovMiljenko SuljicVikash SumberiaSuharyo SumowidagdoSagarika SwainAlexander SzaboImrich SzarkaUzma TabassamSeyed Farid TaghaviGuillaume TaillepiedJun TakahashiGanesh Jagannath TambaveSiyu TangZebo TangDaniel Jesus Tapia TakakiNicolae TapusLucia Anna TarasovicovaMadalina-Gabriela TarzilaArturo TauroAdriana TelescaLivia TerlizziCristina TerrevoliGeorgy TersimonovSanchari ThakurDeepa ThomasRaphael Noel TieulentAnatoly TikhonovAnthony Robert TimminsMilan TkacikTomas TkacikAlberica ToiaNataliya TopilskayaMarco ToppiFernando Torales AcostaTheraa M.A TorkArianna Grisel Torres RamosAntonio TrifiroAndrea Sofia TrioloSushanta TripathyTulika TripathyStefano TrogoloVictor TrubnikovWladyslaw Henryk TrzaskaTomasz Piotr TrzcinskiRosario TurrisiTrine Spedstad TveterKjetil UllalandBerkin UlukutluAntonio UrasMarta UrioniGianluca UsaiMartin ValaNicolo ValleSara ValleroLennart van DoremalenMarco van LeeuwenCasper Arie van VeenRoelof Jan Gijs van WeeldenPierre Vande VyvreDezso VargaZoltan VargaMonika Varga-KofaragoMaria VasileiouAndrey VasilievOton Vazquez DoceVladimir VecherninErmanno VercellinSergio Vergara LimonLucas Anne VermuntRobert VertesiMarta VerweijLinda VickovicZabulon VilakaziOrlando Villalobos BaillieGioacchino VinoAlexander VinogradovTiziano VirgiliVytautas VislaviciusAlexander VodopyanovBenedikt VoelkelMartin Andreas VolklKirill VoloshinSergey VoloshinGiacomo VolpeBarthelemy von HallerIvan VorobyevNikita VozniukJanka VrlakovaBoris WagnerChunzheng WangDongfang WangMichael WeberAdam Tadeusz WegrzynekFelix Thomas WeiglhoferSandro Christian WenzelJohannes Peter WesselsSierra Lisa WeyhmillerJens WiechulaJon WikneGrzegorz Andrzej WilkJeremy John WilkinsonGuido Alexander WillemsBernd Stefan WindelbandMichael Andreas WinnJosephina Rae WrightWenya WuYitao WuRan XuArun Kumar YadavSerpil Yalcin KuzuYorito YamaguchiKosei YamakawaShiming YangSatoshi YanoZhongbao YinIn Kwon YooJin Hee YoonShiming YuanAlperen YuncuValentina ZaccoloChiara ZampolliHenrique Jose Correia ZanoliFederica ZanoneNima ZardoshtiAndrey ZarochentsevPetr ZavadaNikolay ZavyalovMikhail ZhalovBiao ZhangSong ZhangXiaoming ZhangYifei ZhangMingrui ZhaoVladimir ZherebchevskiiZhi YuNatalia ZhigarevaDaicui ZhouYou ZhouJianhui ZhuYa ZhuGennady ZinovjevNicola Zurlo
• Organismes : 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 de Clermont Laboratoire de Physique de Clermont Laboratoire de physique subatomique et des technologies associées Institut Pluridisciplinaire Hubert Curien Institut de Recherches sur les lois Fondamentales de l'Univers 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 Institut de Physique des 2 Infinis de Lyon Institut de Physique des 2 Infinis de Lyon Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut de Recherches sur les lois Fondamentales de l'Univers Laboratoire de Physique de Clermont Institut de Physique des 2 Infinis de Lyon 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 Institut Pluridisciplinaire Hubert Curien Laboratoire de physique subatomique et des technologies associées 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 Pluridisciplinaire Hubert Curien Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut Pluridisciplinaire Hubert Curien Laboratoire de Physique de Clermont Institut Pluridisciplinaire Hubert Curien Laboratoire de Physique de Clermont 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 de Recherches sur les lois Fondamentales de l'Univers Institut de Recherches sur les lois Fondamentales de l'Univers 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 Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de physique subatomique et des technologies associées 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 de Clermont Laboratoire de Physique de Clermont Institut de Physique des 2 Infinis de Lyon Laboratoire de Physique des 2 Infinis Irène Joliot-Curie Institut de Physique des 2 Infinis de Lyon Institut de Recherches sur les lois Fondamentales de l'Univers
• Publié dans Phys.Lett.B le 31/10/2025

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Résumé : This letter reports measurements which characterize the underlying event associated with hard scatterings at mid-pseudorapidity (|η|<0.8) in pp, p–Pb and Pb–Pb collisions at centre-of-mass energy per nucleon pair, sNN=5.02TeV. The measurements are performed with ALICE at the LHC. Different multiplicity classes are defined based on the event activity measured at forward rapidities. The hard scatterings are identified by the leading particle defined as the charged particle with the largest transverse momentum (pT) in the collision and having 8 <pT<15GeV/c. The pT spectra of associated particles (0.5 ≤pT<6GeV/c) are measured in different azimuthal regions defined with respect to the leading particle direction: toward, transverse, and away. The associated charged particle yields in the transverse region are subtracted from those of the away and toward regions. The remaining jet-like yields are reported as a function of the multiplicity measured in the transverse region. The measurements show a suppression of the jet-like yield in the away region and an enhancement of high-pT associated particles in the toward region in central Pb–Pb collisions, as compared to minimum-bias pp collisions. These observations are consistent with previous measurements that used two-particle correlations, and with an interpretation in terms of parton energy loss in a high-density quark gluon plasma. These yield modifications vanish in peripheral Pb–Pb collisions and are not observed in either high-multiplicity pp or p–Pb collisions.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2023
• Auteurs : Shreyasi AcharyaDagmar AdamovaAlexander AdlerGianluca Aglieri RinellaMichelangelo AgnelloNeelima AgrawalZubayer AhammedShakeel AhmadSang Un AhnIshaan AhujaAlexander AkindinovMohammad Al-TuranyDmitry AleksandrovBruno AlessandroHaidar Mas'Ud AlfandaJose Ruben Alfaro MolinaBushra AliAndrea AliciNegin AlizadehvandchaliAnton AlkinJohan AlmeGiacomo AloccoTorsten AltAnna Rita AltamuraIgor AltsybeevMustafa AnaamCristian AndreiAnton AndronicVenelin AnguelovFederico AntinoriPietro AntonioliNicole ApadulaLaurent 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 BailungAlessandro BalbinoAlberto BaldisseriBartosz BalisDebjani BanerjeeZarina BanooRoberto BarberaFrancesco BarileLuca BarioglioMaria BarlouGergely Gabor BarnafoldiLee Stuart BarnbyValerie 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 BelokurovaGyula BencediStefania Maria BeoleAlexandru BercuciYaroslav BerdnikovAnastasia BerdnikovaLuisa BergmannMihaela Gabriela BesoiuLatchezar BetevPartha Pratim BhaduriAnju BhasinMohammad Asif BhatBuddhadeb BhattacharjeeLivio BianchiNicola BianchiJaroslav BielcikJana BielcikovaJacek Bogumil BiernatAlexandre Patrick BigotAnte BilandzicGabor BiroSaikat BiswasNicolas BizéJustin Thomas BlairDmitry BlauMihail Bogdan BlidaruNora BluhmeChristoph BlumeGianluigi BocaFriederike BockTea BodovaAlexey BogdanovStefano BoiJeongsu 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 BysiakMengke CaiHelen Louise CainesAlberto CalivaErnesto Calvo VillarJuan Manuel Mejia CamachoPaolo CameriniFabio de Moraes CanedoMihai CarabasAitor Amatriain CarballoFrancesca CarnesecchiRobin Albert Andre CaronLeopoldo Abranches de CarvalhoJavier Ernesto Castillo CastellanosFabio CatalanoCesar Ceballos SanchezIrakli ChakaberiaPritam ChakrabortySinjini ChandraSylvain ChapelandMarielle ChartierSubhasis ChattopadhyaySukalyan ChattopadhyayTonatiuh Garcia ChavezTiantian ChengCvetan Valeriev CheshkovBrigitte CheynisVasco Miguel Chibante BarrosoDavid Dobrigkeit ChinellatoEmma Sophia ChizzaliJaeyoon ChoSoyeon ChoPeter ChochulaPanagiotis ChristakoglouChristian Holm ChristensenPeter ChristiansenTatsuya ChujoMario CiaccoCorrado CicaloFederico CindoloMichael Rudolf CiupekGiulia ClaiFabio Filippo ColamariaJonathan Samuel ColburnDomenico ColellaManuel ColocciG. 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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 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 Institut de Physique des 2 Infinis de Lyon Laboratoire de Physique Subatomique et de Cosmologie Laboratoire de Physique des 2 Infinis Irène Joliot-Curie 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 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 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 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 Physique des 2 Infinis de Lyon 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 Laboratoire de Physique Subatomique et de Cosmologie 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 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.Lett.B le 31/10/2025

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Résumé : The interaction between $\Lambda$ baryons and kaons/antikaons is a crucial ingredient for the strangeness $S=0$ and $S=-2$ sector of the meson--baryon interaction at low energies. In particular, the $\Lambda{\mathrm{\overline{K}}}$ might help in understanding the origin of states such as the $\Xi\mathrm{(1620)}$, whose nature and properties are still under debate. Experimental data on $\Lambda$$-$${\mathrm{K}}$ and $\Lambda$$-$${\mathrm{\overline{K}}}$ systems are scarce, leading to large uncertainties and tension between the available theoretical predictions constrained by such data. In this Letter we present the measurements of $\Lambda$$-$K$^+\oplus \overline{\Lambda}$$-$K$^-$ and $\Lambda$$-$K$^-\oplus \overline{\Lambda}$$-$K$^+$ correlations obtained in the high-multiplicity triggered data sample in pp collisions at $\sqrt{s}=13$ TeV recorded by ALICE at the LHC. The correlation function for both pairs is modeled using the Lednicky$-$Lyuboshits analytical formula and the corresponding scattering parameters are extracted. The $\Lambda$$-$K$^-\oplus \overline{\Lambda}$$-$K$^+$ correlations show the presence of several structures at relative momenta $k^*$ above 200 MeV/$c$, compatible with the $\Omega$ baryon, the $\Xi\mathrm{(1690)}$, and $\Xi\mathrm{(1820)}$ resonances decaying into $\Lambda$$-$K$^-$ pairs. The low $k^*$ region in the $\Lambda$$-$K$^-\oplus \overline{\Lambda}$$-$K$^+$ also exhibits the presence of the $\Xi\mathrm{(1620)}$ state, expected to strongly couple to the measured pair. The presented data allow to access the $\Lambda$K$^+$ and $\Lambda$K$^-$ strong interaction with an unprecedented precision and deliver the first experimental observation of the $\Xi\mathrm{(1620)}$ decaying into $\Lambda$K$^-$.

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