6533b85bfe1ef96bd12bbdab
RESEARCH PRODUCT
Two-particle differential transverse momentum and number density correlations in p−Pb collisions at 5.02 TeV and Pb-Pb collisions at 2.76 TeV at the CERN Large Hadron Collider
Podist KurashviliLokesh KumarBernhard HohlwegerMarek BombaraDiego StoccoRinaldo RuiLukasz Kamil GraczykowskiYvonne PachmayerOton Vazquez DoceT. Sugitate45Subhasis ChattopadhyayIvan KiselVictor GonzalezJanka VrlakovaJuan Carlos Cabanillas NorisJohann ZmeskalAndrea DublaArvind KhuntiaPrabhakar PalniYaroslav BerdnikovChristoph BlumeLee BarnbyAlexandre SuaideAnar RustamovAlessandro FelicielloBiswarup PaulSalvatore De PasqualeBoris TeyssierJamila ButtPrabhat Ranjan PujahariKetil RøedFabrizio GrosaFelix ReidtSumit BasuMirko PlaninicJiri A. MaresJames Philip IddonMike SasJanusz OleniaczYue Shi LaiProfessor David EvansTome AnticicDavide PaganoSalvatore AiolaCiprian Mihai MituSmbat GrigoryanSergey NikolaevManoj Bhanudas JadhavAndrew LoweClaude PruneauLeticia CunqueiroBorge Svane NielsenFrancesca CarnesecchiGergely Gábor BarnaföldiRamona LeaRafael Derradi De SouzaJeremy WilkinsonJens-jorgen GaardhojeMais SuleymanovAlexander AkindinovAndres Gomez RamirezIgor PshenichnovMarco ToppiKrzysztof RedlichThomas PeitzmannLeo GreinerKristjan GulbrandsenChristine NattrassRanjit NayakDanilo Silva De AlbuquerqueBenedetto Di RuzzaFrancesca BelliniVladimir KovalenkoDebasish DasAntonio UrasDomenico Di BariMohd Danish AzmiJohan AlmeTiziano VirgiliIndranil DasJeremi NiedzielaAndrea FestantiAndreas MathisFederico RonchettiDavid SilvermyrViktor RiabovTahir HussainKai SchwedaPetra LoncarJ. Figiel116Adrian SevcencoPrzemyslaw KarczmarczykKenneth ReadAshutosh Kumar PandeyFrancesca SoramelThomas DietelTimo HildenVladimir VecherninLukas NellenRoman LavickaSang Un AhnMattia FagginPaula Fernanda Toledo MatuokaCatia Maria Annunziata PettaNikola PoljakAyben Karasu UysalWladyslaw Henryk TrzaskaJakub KvapilVladyslav LitichevskyiSyaefudin JaelaniMatteo LupiRaimond SnellingsMarkus KeilGuillaume BatigneErwann MassonNirbhay Kumar BeheraRafael Peretti PezziPaul BuehlerVladimir ZherebchevskyMikael MieskolainenRashmi RaniwalaChinorat KobdajYury MelikyanLuciano RamelloSusanna CostanzaMarielle ChartierSergey FokinRoy LemmonSamrangy SadhuRoberto BarberaNicolo JacazioSami RäsänenDaniele De GruttolaMarie GermainChristian BourjauSergey GorbunovGianluca UsaiMarco Van LeeuwenDavid ChinellatoSomnath KarLuca BarioglioJavier Castillo CastellanosFederico CindoloEnrico ScomparinAnju BhasinPetr ZávadaHector Bello MartinezAnton AlkinElisa MeninnoGabriele FiorenzaFriederike BockAdam KisielChristopher AnsonGrigorii FeofilovYou ZhouIn Kwon YooSandra MorettoSerpil Yalcin KuzuPeter ChristiansenLucas AltenkämperValentina ZaccoloBarbara GuerzoniPaolo CameriniDomenico ColellaLidia GoerlichAlberto Martin Gago MedinaOtwinowski JacekLaurent AphecetcheAntonio BianchiJose Luis Bazo AlbaMikhail ZhalovCesar CeballosMichael WeberDr. Sushanta TripathySean MurrayKenta ShigakiFernando Antonio FlorIan BeardenMałgorzata JanikRahul Ramachandran NairTasnuva ChowdhuryChiara OppedisanoPiotr GasikAdela KravcakovaMarcello BorriMarcello LunardonFrancesco Prinosubject
PhysicsRange (particle radiation)Large Hadron Collider010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyMultiplicity (mathematics)Parton7. Clean energy01 natural sciencesCharged particleNuclear physics0103 physical sciencesQuark–gluon plasmaHigh Energy Physics::ExperimentRapidityNuclear Experiment010306 general physicsEvent (particle physics)description
The production cross section and the transverse momentum distribution of charged particles is measured in pp collisions at √s = 2.76 TeV, 5.02 TeV, 7 TeV and 13 TeV, as well as for Pb-Pb collision at √s_NN = 5.02 TeV and Xe-Xe at √s_NN = 5.44 TeV in ALICE at the LHC. The measurement is performed in the transverse momentum region of 0.15 results show a faster-than-linear increase with the center-of-mass energy and follow a similar trend with respect to previous measurements. The analysis of the p_T spectra in multiplicity intervals show a weak center-of-mass energy dependence when they are compared to their respective inelastic (INEL) pp measurement. The average multiplicity as a function of the collision energy shows a quadratic trend, and the comparison with other ALICE multiplicity measurements exhibits a remarkable agreement, within uncertainties.The transverse momentum spectra in pp collisions are compared to state-of-the-art MC simulations, EPOS LHC and PYTHIA 8 event generators; none of them is able to reproduce the distributions over the full p_T range. The differential cross section in pp collisions is an essential observable for the study of the Quark Gluon Plasma (QGP) created in ultra-relativistic heavy-ion collisions. The absence of a medium formation in pp collisions serves as an essential baseline for studies of particle production and suppression due to parton energy-loss in the QGP. Since pp collisions at √s = 5.44 TeV were not measured by ALICE, the pp reference at this energy was constructed by using a power law interpolation between the s = 5.02 TeV and 7 TeV data. The pp results are compared to the particle production in Pb-Pb collisions at √s_NN = 5.02 TeV and Xe-Xe collisions at √s_NN = 5.44 TeV. The nuclear modification factor R_AA for Pb-Pb and Xe-Xe collisions was calculated and a strong suppression of high-p_T particles is observed in central collisions. The R AA in different systems allows for a differential study of the parton energy loss in the QGP. The comparison of the R AA in multiplicity intervals between the two systems provide insights into the path length dependence of a parton that propagates in the medium.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-10-10 | Physical Review C |