Multiplicity dependence of charged pion, kaon, and (anti)proton production at large transverse momentum in p–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>5.02</mml:mn><mml:mtext> TeV</mml:mtext></mml:math>
J. 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 RepublicM. M. AggarwalPhysics Department, Panjab University, Chandigarh, IndiaG. Aglieri RinellaEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandM. AgnelloSezione INFN, Turin, ItalyN. AgrawalIndian Institute of Technology Bombay (IIT), Mumbai, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata, IndiaS. AhmadDepartment of Physics, Aligarh Muslim University, Aligarh, IndiaS. U. AhnKorea Institute of Science and Technology Information, Daejeon, South KoreaS. AiolaYale University, New Haven, CT, United StatesA. AkindinovInstitute for Theoretical and Experimental Physics, Moscow, RussiaSk Noor AlamVariable Energy Cyclotron Centre, Kolkata, IndiaD. AleksandrovNational Research Centre Kurchatov Institute, Moscow, RussiaB. AlessandroSezione INFN, Turin, ItalyD. AlexandreSchool of Physics and Astronomy, University of Birmingham, Birmingham, United KingdomR. Alfaro MolinaInstituto de Física, Universidad Nacional Autónoma de México, Mexico City, MexicoA. AliciCentro Fermi – Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, Rome, ItalyA. AlkinBogolyubov Institute for Theoretical Physics, Kiev, UkraineJ. R. M. AlmarazUniversidad Autónoma de Sinaloa, Culiacán, MexicoJ. AlmeFaculty of Engineering, Bergen University College, Bergen, NorwayT. AltS. AltinpinarSezione INFN, Turin, ItalyI. AltsybeevBogolyubov Institute for Theoretical Physics, Kiev, UkraineC. Alves Garcia PradoSezione INFN, Bologna, ItalyC. AndreiCentro Fermi – Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", Rome, ItalyA. AndronicV. AnguelovNational Research Centre Kurchatov Institute, Moscow, RussiaT. AntičićF. AntinoriInstituto de Física, Universidad Nacional Autónoma de México, Mexico City, MexicoP. AntonioliL. AphecetcheFaculty of Engineering, Bergen University College, Bergen, NorwayH. AppelshäuserKorea Institute of Science and Technology Information, Daejeon, South KoreaS. ArcelliSezione INFN, Turin, ItalyR. ArnaldiUniversidad Autónoma de Sinaloa, Culiacán, MexicoO. W. ArnoldI. C. ArseneSezione INFN, Bologna, ItalyM. ArslandokFaculty of Engineering, Bergen University College, Bergen, NorwayB. AudurierSezione INFN, Turin, ItalyA. AugustinusR. AverbeckUniversidad Autónoma de Sinaloa, Culiacán, MexicoM. D. AzmiA. BadalàY. W. BaekS. BagnascoSezione INFN, Turin, ItalyR. BailhacheUniversidad Autónoma de Sinaloa, Culiacán, MexicoR. BalaUniversidad Autónoma de Sinaloa, Culiacán, MexicoS. BalasubramanianSezione INFN, Turin, ItalyA. BaldisseriR. C. BaralA. M. BarbanoVariable Energy Cyclotron Centre, Kolkata, IndiaR. BarberaUniversidad Autónoma de Sinaloa, Culiacán, MexicoF. BarileInstituto de Física, Universidad Nacional Autónoma de México, Mexico City, MexicoG. G. BarnaföldiPhysics Department, Panjab University, Chandigarh, IndiaL. S. BarnbyV. BarretNational Research Centre Kurchatov Institute, Moscow, RussiaP. BartaliniKlaus BarthBogolyubov Institute for Theoretical Physics, Kiev, UkraineJ. BartkeFaculty of Engineering, Bergen University College, Bergen, NorwayE. BartschFaculty of Engineering, Bergen University College, Bergen, NorwayM. BasileFaculty of Engineering, Bergen University College, Bergen, NorwayN. BastidBogolyubov Institute for Theoretical Physics, Kiev, UkraineS. BasuSezione INFN, Turin, ItalyB. BathenSezione INFN, Turin, ItalyG. BatigneIndian Institute of Technology Bombay (IIT), Mumbai, IndiaA. Batista CamejoB. BatyunyaSezione INFN, Turin, ItalyP. C. BatzingI. G. BeardenH. BeckKorea Institute of Science and Technology Information, Daejeon, South KoreaC. BeddaCentro Fermi – Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi", Rome, ItalyN. K. BeheraI. BelikovBogolyubov Institute for Theoretical Physics, Kiev, UkraineF. BelliniInstituto de Física, Universidad Nacional Autónoma de México, Mexico City, MexicoH. Martı́nezKorea Institute of Science and Technology Information, Daejeon, South KoreaR. BellwiedUniversidad Autónoma de Sinaloa, Culiacán, MexicoR. BelmontUniversidad Autónoma de Sinaloa, Culiacán, MexicoE. Belmont‐MorenoFaculty of Engineering, Bergen University College, Bergen, NorwayV. BelyaevNational Research Centre Kurchatov Institute, Moscow, RussiaP. BenacekG. BencédiIndian Institute of Technology Bombay (IIT), Mumbai, IndiaS. BeolèSezione INFN, Turin, ItalyI. BerceanuBogolyubov Institute for Theoretical Physics, Kiev, UkraineA. BercuciY. BerdnikovD. BerényiSchool of Physics and Astronomy, University of Birmingham, Birmingham, United KingdomR. A. BertensUniversidad Autónoma de Sinaloa, Culiacán, MexicoD. BerzanoSchool of Physics and Astronomy, University of Birmingham, Birmingham, United KingdomL. BetevFaculty of Engineering, Bergen University College, Bergen, NorwayA. BhasinI. R. BhatEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandA. K. BhatiInstitute for Theoretical and Experimental Physics, Moscow, RussiaB. BhattacharjeeSezione INFN, Turin, ItalyJ. BhomFaculty of Engineering, Bergen University College, Bergen, NorwayL. BianchiFaculty of Engineering, Bergen University College, Bergen, NorwayN. BianchiBogolyubov Institute for Theoretical Physics, Kiev, UkraineC. BianchinSezione INFN, Bologna, ItalyJ. BielčíkFaculty of Engineering, Bergen University College, Bergen, NorwayJ. BielčíkováFaculty of Engineering, Bergen University College, Bergen, NorwayA. BilandzicG. BíróIndian Institute of Technology Bombay (IIT), Mumbai, India
2016lv
ABI
Аннотация
The production of charged pions, kaons and (anti)protons has been measured at mid-rapidity (−0.5<y<0) in p–Pb collisions at sNN=5.02 TeV using the ALICE detector at the LHC. Exploiting particle identification capabilities at high transverse momentum (pT), the previously published pT spectra have been extended to include measurements up to 20 GeV/c for seven event multiplicity classes. The pT spectra for pp collisions at s=7 TeV, needed to interpolate a pp reference spectrum, have also been extended up to 20 GeV/c to measure the nuclear modification factor (RpPb) in non-single diffractive p–Pb collisions. At intermediate transverse momentum (2<pT<10 GeV/c) the proton-to-pion ratio increases with multiplicity in p–Pb collisions, a similar effect is not present in the kaon-to-pion ratio. The pT dependent structure of such increase is qualitatively similar to those observed in pp and heavy-ion collisions. At high pT (>10 GeV/c), the particle ratios are consistent with those reported for pp and Pb–Pb collisions at the LHC energies. At intermediate pT the (anti)proton RpPb shows a Cronin-like enhancement, while pions and kaons show little or no nuclear modification. At high pT the charged pion, kaon and (anti)proton RpPb are consistent with unity within statistical and systematic uncertainties.
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