6533b861fe1ef96bd12c4c5a
RESEARCH PRODUCT
Global polarization of Λ and Λ¯ hyperons in Pb-Pb collisions at sNN= 2.76 and 5.02 TeV
Fabio CatalanoNorbert NovitzkyLokesh KumarBernhard HohlwegerBarbara TrzeciakMarek BombaraDiego StoccoRinaldo RuiYvonne PachmayerOton Vazquez DoceSouvik Priyam AdhyaSubhasis ChattopadhyayIvan KiselVictor GonzalezJanka VrlakovaAndrea DublaArvind KhuntiaPrabhakar PalniYaroslav BerdnikovChristoph BlumeJussi ViinikainenLee BarnbyAlexandre SuaideAnar RustamovAlessandro FelicielloUliana DmitrievaBiswarup PaulSalvatore De PasqualeJamila ButtMasanori OginoKetil RøedFabrizio GrosaFelix ReidtSumit BasuMirko PlaninicJames Philip IddonMike SasAshim RoyJanusz OleniaczYue Shi LaiProfessor David EvansTome AnticicDavide PaganoSmbat GrigoryanSergey NikolaevManoj Bhanudas JadhavClaude PruneauLeticia CunqueiroBorge Svane NielsenFrancesca CarnesecchiGergely Gábor BarnaföldiRafael Derradi De SouzaJeremy WilkinsonJens-jorgen GaardhojeMais SuleymanovAlexander AkindinovAndres Gomez RamirezIgor PshenichnovMarco ToppiKrzysztof RedlichThomas PeitzmannLeo GreinerKristjan GulbrandsenChristine NattrassRanjit NayakFrancesca BelliniVladimir KovalenkoDebasish DasPietro FecchioAntonio UrasDmitry SerebryakovDomenico Di BariMohd Danish AzmiJohan AlmeTiziano VirgiliAndrea FestantiAndreas MathisAlexander BolozdynyaFederico RonchettiDavid SilvermyrViktor RiabovKai SchwedaSimone RagoniPetra LoncarJ. Figiel116Adrian SevcencoPrzemyslaw KarczmarczykKenneth ReadAshutosh Kumar PandeyFrancesca SoramelPiotr KonopkaThomas DietelTimo HildenVladimir VecherninDaniel DąbrowskiLukas NellenRoman LavickaSang Un AhnMattia FagginPaula Fernanda Toledo MatuokaNikola PoljakRutuparna RathAyben Karasu UysalJakub KvapilVladyslav LitichevskyiSyaefudin JaelaniRaimond SnellingsMarkus KeilGuillaume BatigneErwann MassonNirbhay Kumar BeheraRafael Peretti PezziVladimir ZherebchevskyMikael MieskolainenRashmi RaniwalaChinorat KobdajYury MelikyanLuciano RamelloSusanna CostanzaMarielle ChartierSergey FokinRoy LemmonSamrangy SadhuAnisa KhatunRoberto BarberaAndrey ErokhinNicolo JacazioSami RäsänenDaniele De GruttolaMarie GermainSandro Christian WenzelGianluca UsaiMarco Van LeeuwenDavid ChinellatoDmitry BlauSomnath KarLuca BarioglioJavier Castillo CastellanosValentina Mantovani SartiFederico CindoloEnrico ScomparinAnju BhasinAnton AlkinGabriele FiorenzaFriederike BockAdam KisielChristopher AnsonGrigorii FeofilovYou ZhouIn Kwon YooJun TakahashiSandra MorettoSerpil Yalcin KuzuPeter ChristiansenPiotr NowakowskiValentina ZaccoloBarbara GuerzoniPaolo CameriniDomenico ColellaDaniele PistoneLidia GoerlichBedangadas MohantyAlberto Martin Gago MedinaOtwinowski JacekLaurent AphecetcheChiara PintoAntonio BianchiJose Luis Bazo AlbaCesar CeballosMichael WeberDr. Sushanta TripathySean MurrayKenta ShigakiFernando Antonio FlorIan BeardenRahul Ramachandran NairMiguel ArratiaMatthew BucklandTasnuva ChowdhuryChiara OppedisanoPiotr GasikAdela KravcakovaMarcello BorriMarcello LunardonSebastian BysiakGiuseppe MandaglioFrancesco Prinosubject
PhysicsNuclear reactionParticle physicsLarge Hadron Collider010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyExtrapolationHyperonPolarization (waves)Lambda01 natural sciences0103 physical sciencesHigh Energy Physics::ExperimentRapidityNuclear Experiment010306 general physicsCentralitydescription
The global polarization of the $\Lambda$ and $\overline\Lambda$ hyperons is measured for Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 2.76 and 5.02 TeV recorded with the ALICE at the LHC. The results are reported differentially as a function of collision centrality and hyperon's transverse momentum ($p_{\rm{T}}$) for the range of centrality 5-50%, $0.5 < p_{\rm{T}} <5$ GeV/$c$, and rapidity $|y|<0.5$. The hyperon global polarization averaged for Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 2.76 and 5.02 TeV is found to be consistent with zero, $\langle P_{\rm{H}}\rangle$ (%) $\approx$ 0.01 $\pm$ 0.06 (stat.) $\pm$ 0.03 (syst.) in the collision centrality range 15-50%, where the largest signal is expected. The results are compatible with expectations based on an extrapolation from measurements at lower collision energies at RHIC, hydrodynamical model calculations, and empirical estimates based on collision energy dependence of directed flow, all of which predict the global polarization values at LHC energies of the order of 0.01%.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-04-20 | Physical Review C |