Multi-strange baryon production at mid-rapidity in Pb–Pb collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msqrt><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">NN</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>2.76</mml:mn><mml:mtext> TeV</mml:mtext></mml:math>
B. AbelevLawrence Livermore National Laboratory, Livermore, CA, United StatesJ. AdamFaculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech RepublicD. AdamováNuclear Physics Institute, Academy of Sciences of the Czech Republic, Řež u Prahy, Czech RepublicA. AdareYale University, New Haven, CT, United StatesM. M. AggarwalPhysics Department, Panjab University, Chandigarh, IndiaG. Aglieri RinellaEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandM. AgnelloPolitecnico di Torino, Turin, ItalyA.G. AgócsWigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, HungaryA. AgostinelliDipartimento di Fisica e Astronomia dellʼUniversità and Sezione INFN, Bologna, ItalyZ. AhammedVariable Energy Cyclotron Centre, Kolkata, IndiaN. AhmadDepartment of Physics, Aligarh Muslim University, Aligarh, IndiaA. Ahmad MasoodiDepartment of Physics, Aligarh Muslim University, Aligarh, IndiaI. AhmedCOMSATS Institute of Information Technology (CIIT), Islamabad, PakistanS. U. AhnKorea Institute of Science and Technology Information, Daejeon, South KoreaS. A. AhnKorea Institute of Science and Technology Information, Daejeon, South KoreaI. AimoPolitecnico di Torino, Turin, ItalyS. AiolaYale University, New Haven, CT, United StatesM. AjazCOMSATS Institute of Information Technology (CIIT), Islamabad, PakistanA. AkindinovInstitute for Theoretical and Experimental Physics, Moscow, RussiaD. AleksandrovRussian Research Centre Kurchatov Institute, Moscow, RussiaB. AlessandroLawrence Livermore National Laboratory, Livermore, CA, United StatesD. AlexandreUniversity of Oslo, Oslo, NorwayA. AliciA. AlkinJ. AlmeWestern Norway University of Applied Sciences, Bergen, NorwayT. AltUniversity of Bergen, Bergen, NorwayV. AltiniUniversity of Oslo, Oslo, NorwayS. AltinpinarUniversity of Bergen, Bergen, NorwayI. AltsybeevUniversity of Oslo, Oslo, NorwayC. Alves Garcia PradoUniversity of Oslo, Oslo, NorwayC. AndreiUniversity of Oslo, Oslo, NorwayA. AndronicV. AnguelovUniversity of Oslo, Oslo, NorwayJ. AnielskiUniversity of Oslo, Oslo, NorwayT. AntičićLawrence Livermore National Laboratory, Livermore, United StatesF. AntinoriUniversity of Oslo, Oslo, NorwayP. AntonioliUniversity of Oslo, Oslo, NorwayL. AphecetchePanjab University, Chandigarh, IndiaH. AppelshäuserYale University, New Haven, United StatesN. ArborHungarian Academy of Sciences, Budapest, HungaryS. ArcelliRussian Research Centre Kurchatov Institute, Moscow, RussiaN. ArmestoRussian Research Centre Kurchatov Institute, Moscow, RussiaR. ArnaldiVariable Energy Cyclotron Centre, Kolkata, IndiaT. AronssonDipartimento di Fisica e Astronomia dell'Università and Sezione INFN, Bologna, ItalyI. C. ArseneGSI Helmholtz Centre for Heavy Ion Research, Darmstadt, GermanyM. ArslandokAligarh Muslim University, Aligarh, IndiaA. AugustinusR. AverbeckRussian Research Centre Kurchatov Institute, Moscow, RussiaT. C. AwesGSI Helmholtz Centre for Heavy Ion Research, Darmstadt, GermanyM. D. AzmiM. BachCOMSATS Institute of Information Technology (CIIT), Islamabad, PakistanA. BadalàY. W. BaekR. BailhacheRussian Research Centre Kurchatov Institute, Moscow, RussiaV. BairathiRussian Research Centre Kurchatov Institute, Moscow, RussiaR. BalaRussian Research Centre Kurchatov Institute, Moscow, RussiaA. BaldisseriF. Baltasar Dos Santos PedrosaUniversity of Oslo, Oslo, NorwayJ. BánCzech Technical University in Prague, Prague, CzechiaR. C. BaralR. BarberaRussian Research Centre Kurchatov Institute, Moscow, RussiaF. BarileUniversity of Oslo, Oslo, NorwayG. G. BarnaföldiPanjab University, Chandigarh, IndiaL. S. BarnbyUniversity of Oslo, Oslo, NorwayV. BarretRussian Research Centre Kurchatov Institute, Moscow, RussiaJ. BartkeCzech Technical University in Prague, Prague, CzechiaM. BasileCOMSATS Institute of Information Technology (CIIT), Islamabad, PakistanN. BastidRussian Research Centre Kurchatov Institute, Moscow, RussiaS. BasuRussian Research Centre Kurchatov Institute, Moscow, RussiaB. BathenLawrence Livermore National Laboratory, Livermore, CA, United StatesG. BatigneGoethe University Frankfurt, Frankfurt am Main, GermanyB. BatyunyaLawrence Livermore National Laboratory, Livermore, CA, United StatesP. C. BatzingUniversity of Oslo, Oslo, NorwayC. BaumannHungarian Academy of Sciences, Budapest, HungaryI. G. BeardenUniversity of Oslo, Oslo, NorwayKenneth M. BeckEuropean Organization for Nuclear Research, Geneva, SwitzerlandN. K. BeheraI. BelikovInstitute for Theoretical and Experimental Physics, Moscow, RussiaF. BelliniUniversity of Oslo, Oslo, NorwayR. BellwiedRussian Research Centre Kurchatov Institute, Moscow, RussiaE. Belmont‐MorenoRussian Research Centre Kurchatov Institute, Moscow, RussiaG. BencédiGoethe University Frankfurt, Frankfurt am Main, GermanyS. BeolèRussian Research Centre Kurchatov Institute, Moscow, RussiaI. BerceanuInstitute for Theoretical and Experimental Physics, Moscow, RussiaA. BercuciY. BerdnikovD. BerényiRussian Research Centre Kurchatov Institute, Moscow, RussiaA. A. E. BergognonR. A. BertensD. BerzanoRussian Research Centre Kurchatov Institute, Moscow, RussiaL. BetevRussian Research Centre Kurchatov Institute, Moscow, RussiaA. BhasinA. K. BhatiInstitute for Theoretical and Experimental Physics, Moscow, RussiaJ. BhomCzech Technical University in Prague, Prague, CzechiaL. BianchiRussian Research Centre Kurchatov Institute, Moscow, RussiaN. BianchiRussian Research Centre Kurchatov Institute, Moscow, RussiaC. BianchinHungarian Academy of Sciences, Budapest, HungaryJ. BielčíkCzech Technical University in Prague, Prague, CzechiaJ. BielčíkováCzech Technical University in Prague, Prague, CzechiaA. Bilandzic
2013lv
ABI
Аннотация
The production of Ξ− and Ω− baryons and their anti-particles in Pb–Pb collisions at sNN=2.76 TeV has been measured using the ALICE detector. The transverse momentum spectra at mid-rapidity (|y|<0.5) for charged Ξ and Ω hyperons have been studied in the range 0.6<pT<8.0 GeV/c and 1.2<pT<7.0 GeV/c, respectively, and in several centrality intervals (from the most central 0–10% to the most peripheral 60–80% collisions). These spectra have been compared with the predictions of recent hydrodynamic models. In particular, the Kraków and EPOS models give a satisfactory description of the data, with the latter covering a wider pT range. Mid-rapidity yields, integrated over pT, have been determined. The hyperon-to-pion ratios are similar to those at RHIC: they rise smoothly with centrality up to 〈Npart〉∼150 and saturate thereafter. The enhancements (yields per participant nucleon relative to those in pp collisions) increase both with the strangeness content of the baryon and with centrality, but are less pronounced than at lower energies.
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