6533b839fe1ef96bd12a6398
RESEARCH PRODUCT
Λc+ Production and Baryon-to-Meson Ratios in pp and p -Pb Collisions at sNN=5.02 TeV at the LHC
Rosario TurrisiWenjing DengEvgeny KondratyukTatiana LazarevaChristian Holm ChristensenHikari MurakamiJørgen André LienWilliam Edward WittPaolo GiubellinoPierre Vande VyvrePhilippe CrochetJaehyun KimLuigi Dello StrittoIn Kwon YooAdam Tadeusz WegrzynekSarah Louise La PointeGermano BonomiAlberto Martin Gago MedinaBruno EspagnonOla Slettevoll GroettvikJan JadlovskyShi QiuJochen KleinJacek Tomasz OtwinowskiOton Vazquez DoceZhanna KhabanovaAlexander BolozdynyaYoungil KwonJulian Wojciech MyrchaArthur Willem Jean GalLaura SerksnyteRainer Arno Ernst RenfordtLucia Anna HusovaAndrey ZarochentsevPetr NomokonovLiudmila MalininaTrine Spedstad TveterGianluca Aglieri RinellaIvan KiselDavid HorakRashmi RaniwalaAnantachai LakrathokNorbert NovitzkyLuca QuagliaSebastian HornungClaude Andre PruneauLucas AltenkamperDmitry BudnikovRoberto BarberaElena BottaZhongbao YinJerome JungIgor PshenichnovRamona LeaJonathan Samuel ColburnMarten Ole SchmidtI. DasYitao WuHadi HassanChiara PintoPhilip HauerIngrid Mckibben LofnesRabi Soto CamachoJan FigielAlperen YuncuClaudiu Cornel SchiauaJose Luis Bazo AlbaPablo Fierro RojasMaciej SlupeckiJens Joergen GaardhoejeAna Maria MarinKlaus BarthAndrea DanuGuillaume BatigneMassimo AngelettiDeepa ThomasSukalyan ChattopadhyayMarcello LunardonAnju BhasinMarco GiacaloneAlexandre Alarcon Do Passo SuaideMin Jung KweonAlexander AkindinovKai Oliver SchwedaRobin Albert Andre CaronJustin Thomas BlairSomnath KarVolodymyr YurchenkoMichael Andreas WinnRenu BalaAlberto BaldisseriAndrea FerreroAmalia PopJames Declan MulliganGuy PaicYury SibiryakYury RyabovUlrich FuchsCorrado GargiuloAntonio Ortiz VelasquezKunal GargMaximiliano PuccioRaimond SnellingsHaidar Mas'ud AlfandaLucrezia Camilla MigliorinSeoyoung NohRoman RogalevProttoy DasOmar Vazquez RuedaBarbara Ewa ErazmusRachid GuernaneRoy Crawford LemmonImrich SzarkaMinjung KimJun TakahashiNicole BastidJinjin PanYury MelikyanJana BielcikovaTomas HermanRoberto DiviaFabian PliquettMikolaj KrzewickiRaffaele GrossoMichael Henry OliverLaurent Bernard AphecetcheHerve BorelMichael JungMiljenko SuljicBeomkyu KimAndrea DublaBruno AlessandroSudhir RaniwalaTatiana KaravichevaDenise Aparecida Moreira De GodoyNikolai SmirnovMario Rodriguez CahuantziSandro Christian WenzelMauro Rogerio CosentinoSheetal SharmaSumit BasuNora De MarcoFernando Torales AcostaYvonne Chiara PachmayerAlessandro FelicielloPurba BhattacharyaYifei ZhangJeongsu BokRaphael Noel TieulentDmitry Yurevich PeresunkoAnkhi RoyYue Shi LaiAnnalisa De CaroErin Frances GaugerVit KuceraPremomoy GhoshKonstantin MikhaylovJose Ruben Alfaro MolinaRobert VertesiMarkus BallBjarte KilengChun-lu HuangIonel StanMohammed HamidMohd Danish AzmiPeter MalzacherSebastian Adam BysiakLatchezar BetevIgor MorozovSyaefudin JaelaniLaura FabbiettiJ. 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PhysicsParticle physicsLarge Hadron ColliderMeson010308 nuclear & particles physicsNuclear TheoryHigh Energy Physics::PhenomenologyHadronGeneral Physics and Astronomy01 natural sciencesHadronizationBaryon0103 physical sciencesTransverse momentumHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsdescription
The prompt production of the charm baryon Λ c + and the Λ c + / D 0 production ratios were measured at midrapidity with the ALICE detector in p p and p -Pb collisions at s NN = 5.02 TeV . These new measurements show a clear decrease of the Λ c + / D 0 ratio with increasing transverse momentum ( p T ) in both collision systems in the range 2 p T 12 GeV / c , exhibiting similarities with the light-flavor baryon-to-meson ratios p / π and Λ / K S 0 . At low p T , predictions that include additional color-reconnection mechanisms beyond the leading-color approximation, assume the existence of additional higher-mass charm-baryon states, or include hadronization via coalescence can describe the data, while predictions driven by charm-quark fragmentation processes measured in e + e - and e - p collisions significantly underestimate the data. The results presented in this Letter provide significant evidence that the established assumption of universality (colliding-system independence) of parton-to-hadron fragmentation is not sufficient to describe charm-baryon production in hadronic collisions at LHC energies.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-11-09 | Physical Review Letters |