Multiplicity dependence of pion, kaon, proton and lambda production in p–Pb collisions at sNN=5.02 TeV

In this Letter, comprehensive results on pi(+/-), K-+/-, K-S(0), p((p) over bar) and A((A) over bar) production at mid-rapidity (0 < y(CMS) < 0.5) in p-Pb collisions at root s(NN) = 5.02 TeV, measured by the ALICE detector at the LHC, are reported. The transverse momentum distributions exhibit a hardening as a function of event multiplicity, which is stronger for heavier particles. This behavior is similar to what has been observed in pp and Pb-Pb collisions at the LHC. The measured pr distributions are compared to d-Au, Au-Au and Pb-Pb results at lower energy and with predictions based on QCD-inspired and hydrodynamic models. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.

Matthias Rudolph Richter | Dieter Røhrich | Dagmar Adamova | Jovan Milosevic | Oystein Senneset Haaland | Ø. Djuvsland | Ketil Røed | Sul-Ah Ahn | Shiming Yang | H. Qvigstad | Jon Wikne | Håvard Helstrup | Kristin Fanebust Hetland | Andrea Agostinelli | Nazeer Ahmad | Jorgen Andre Lien | Johan Alme | Zubayer Ahammed | Gunnar Løvhøiden | Kjetil Ullaland | T. B. Skaali | Betty Abelev | Joakim Nystrand | Attiq Ur Rehman | Rune Langoy | Muhammad Ajaz | Per-Ivar Lønne | Sang Un Ahn | Jaroslav Adam | G. Løvhøiden | J. Milosevic | Z. Ahammed | G. Eyyubova | D. Adamova | G. Rinella | S. Ahn | J. Alme | O. Dordic | K. Hetland | B. Kileng | R. Langøy | J. Lien | J. Nystrand | A. Rehman | M. Richter | T. Tveter | K. Ullaland | B. Wagner | J. Wikne | Shiming Yang | N. Ahmad | K. Skjerdal | A. Szostak | M. Aggarwal | D. Fehlker | M. S. Nilsson | D. Røhrich | S. Lindal | S. Altinpinar | K. Røed | S. Salazar | Ø. Djuvsland | H. Helstrup | B. Abelev | A. Adare | A. Agostinelli | H. Erdal | M. Huang | J. Adam | A. Agocs | I. Arsene | O. Haaland | P. Lønne | H. Qvigstad | A. A. Masoodi | M. Ajaz | Sul-Ah Ahn | Paul Christoph Bätzing | Andrew Marshall Adare | Madan M. Aggarwal | A. Ahmad Masoodi | Sedat Altinpinar | Ionut Christian Arsene | Olja Dordic | Hege Austrheim Erdal | Gyulnara Eyyubova | Dominik Fehlker | Bjarte Kileng | Svein Lindal | Mads Stormo Nilsson | Toralf Bernhard Skaali | Artur Krzysztof Szostak | Trine Spedstad Tveter | Boris Wagner | M. Huang | Gianluca Aglieri Rinella | Saul Aguilar Salazar | K. Skjerdal | Andreas Gabor Agocs | S. U. Ahn | S. Ahn | D. Adamová | R. Langoy | Alice Collaboration

[1]  P. Bożek.  Collective flow in p-Pb and d-Pb collisions at TeV energies , 2011, 1112.0915.

[2]  E. al.,et al.  Strange and Multi-strange Particle Production in Au+Au Collisions at sqrt sNN = 62.4GeV , 2010, 1010.0142.

[3]  J. Katzy,et al.  EPOS LHC: Test of collective hadronization with data measured at the CERN Large Hadron Collider , 2015 .

[4]  D. Volyanskyy,et al.  Strange particle production in pp collisions at $ \sqrt {s} = 0.9 $ and 7 TeV , 2011, 1102.4282.

[5]  P. Skands.  Tuning Monte Carlo Generators: The Perugia Tunes , 2010, 1005.3457.

[6]  Venugopalan,et al.  Computing quark and gluon distribution functions for very large nuclei. , 1993, Physical review. D, Particles and fields.

[7]  B. Müller,et al.  Hadronization in heavy-ion collisions: recombination and fragmentation of partons. , 2003, Physical Review Letters.

[8]  P. Antonioli,et al.  Performance of the ALICE Time-Of-Flight detector at the LHC , 2013 .

[9]  Heinz,et al.  Thermal phenomenology of hadrons from 200A GeV S+S collisions. , 1993, Physical review. C, Nuclear physics.

[10]  Alan D. Martin,et al.  Review of Particle Physics: Particle data group , 2012 .

[11]  Peter Skands,et al.  Non-perturbative QCD effects and the top mass at the Tevatron , 2007, hep-ph/0703081.

[12]  G. Qin,et al.  Elliptic and triangular flow anisotropy in deuteron-gold collisions at RHIC and proton-lead collisions at the LHC , 2013, 1306.3439.

[13]  J. G. Contreras,et al.  Multi-Strange Baryon Production in pp Collisions at s = 7 TeV with ALICE , 2012 .

[14]  S. Voloshin,et al.  Radial and elliptic flow at RHIC: Further predictions , 2001, hep-ph/0101136.

[15]  Gebräuchliche Fertigarzneimittel,et al.  V , 1893, Therapielexikon Neurologie.

[16]  J. G. Contreras,et al.  Pseudorapidity density of charged particles in p+Pb collisions at √(s(NN))=5.02 TeV. , 2012, Physical review letters.

[17]  V. M. Ghete,et al.  Study of the production of charged pions, kaons, and protons in pPb collisions at $$\sqrt{s_{NN}} =\; $$sNN=5.02$$\,\text {TeV}$$TeV , 2014 .

[18]  Z. L. Matthews,et al.  The ALICE experiment at the CERN LHC , 2008 .

[19]  Peter Skands,et al.  Energy scaling of minimum-bias tunes , 2011, 1103.3649.

[20]  Wojciech Broniowski,et al.  Correlations from hydrodynamic flow in pPb collisions , 2012, 1211.0845.

[21]  Jr.,et al.  Spectra and ratios of identified particles in Au+Au and d+Au collisions at √sNN=200 GeV , 2013, 1304.3410.

[22]  S. Bablok,et al.  Charged-particle multiplicity measurement in proton–proton collisions at $\sqrt{s}=7$ TeV with ALICE at LHC , 2010 .

[23]  N. K. Behera,et al.  Strangeness enhancement in Cu-Cu and Au-Au collisions at √S(NN)=200 GeV. , 2011, Physical review letters.

[24]  M. A. Diaz Corchero,et al.  Transverse momentum distribution and nuclear modification factor of charged particles in p+Pb collisions at sqrt[s(NN)] = 5.02 TeV. , 2012, Physical review letters.

[25]  et al,et al.  Systematic measurements of identified particle spectra in pp, d+Au, and Au+Au collisions at the STAR detector , 2008, 0808.2041.

[26]  Miss A.O. Penney.  (b) , 1974, The New Yale Book of Quotations.

[27]  G. Bruno,et al.  Observation of long-range, near-side angular correlations in pPb collisions at the LHC , 2013 .

[28]  C. Wetterich,et al.  Chemical freeze-out and the QCD phase transition temperature , 2003, nucl-th/0311005.

[29]  Sahal Yacoob,et al.  Measurement with the ATLAS detector of multi-particle azimuthal correlations in p plus Pb collisions at root s(NN)=5.02 TeV , 2013 .

[30]  L. Mclerran,et al.  A Monte Carlo study of SU(2) Yang-Mills theory at finite temperature , 1981 .

[31]  F. Cerutti,et al.  The FLUKA code: Description and benchmarking , 2007 .

[32]  Matthias Rudolph Richter,et al.  Long-range angular correlations on the near and away side in p-Pb collisions at root S-NN=5.02 TeV , 2012, 1212.2001.

[33]  LATTICE QCD AT FINITE TEMPERATURE , 2003, hep-ph/0303042.

[34]  Giorgio Parisi,et al.  Exponential Hadronic Spectrum and Quark Liberation , 1975 .

[35]  I. Zahed,et al.  High-multiplicity pp and pA collisions: Hydrodynamics at its edge , 2013, 1301.4470.

[36]  D. Volyanskyy,et al.  Observation of long-range, near-side angular correlations in proton-proton collisions at the LHC , 2010, 1009.4122.

[37]  M. Kowalski,et al.  The ALICE TPC, a large 3-dimensional tracking device with fast readout for ultra-high multiplicity events , 2010, 1001.1950.

[38]  U. Heinz.  Concepts of Heavy-Ion Physics , 2004, hep-ph/0407360.

[39]  G. Paic,et al.  Color reconnection and flow-like patterns in pp collisions , 2014 .

[40]  T. J. Humanic,et al.  Strange particle production in proton–proton collisions at √s = 0.9 TeV with ALICE at the LHC , 2010, 1012.3257.

[41]  R M Buckingham,et al.  Observation of associated near-side and away-side long-range correlations in sqrt[s(NN)]=5.02 TeV proton-lead collisions with the ATLAS detector. , 2012, Physical review letters.

[42]  Torbjörn Sjöstrand,et al.  Interleaved parton showers and tuning prospects , 2010, 1011.1759.

[43]  A. Moiseev,et al.  Inelastic cross section for antihelium on nuclei: an empirical formula for use in the experiments to search for cosmic antimatter , 1997 .

[44]  Tsu Yao,et al.  Strange Particle Production in Proton-Proton Collisions , 1962 .

[45]  Results from the Relativistic Heavy Ion Collider , 2006, nucl-th/0602029.

[46]  P. Bożek.  Hydrodynamic flow from RHIC to LHC , 2011, 1111.4398.

[47]  Ericka Stricklin-Parker,et al.  Ann , 2005 .

[48]  Matthias Rudolph Richter,et al.  Multiplicity dependence of the average transverse momentum in pp, p-Pb, and Pb-Pb collisions at the LHC , 2013 .

[49]  J. Rafelski,et al.  Strangeness chemical equilibration in a quark-gluon plasma , 2007 .

[50]  Andrea Benaglia,et al.  Multiplicity and transverse momentum dependence of two- and four-particle correlations in pPb and PbPb collisions , 2013 .

[51]  S. Bablok,et al.  Production of pions, kaons and protons in pp collisions at $\sqrt{s}= 900~\mathrm{GeV}$ with ALICE at the LHC , 2011 .

[52]  P. Tribedy,et al.  Initial-state geometry and the role of hydrodynamics in proton-proton, proton-nucleus, and deuteron-nucleus collisions , 2013, 1304.3403.

[53]  A. Andronic,et al.  Thermal hadron production in relativistic nuclear collisions: The hadron mass spectrum, the horn, and the QCD phase transition , 2009 .

[54]  K. Shigaki,et al.  Identified charged particle spectra and yields in Au + Au collisions at √sNN = 200 GeV , 2004 .

[55]  John B. Shoven,et al.  I , Edinburgh Medical and Surgical Journal.

[56]  S. Giani,et al.  GEANT Detector Description and Simulation Tool , 1994 .

[57]  J. G. Contreras,et al.  Pion, Kaon, and Proton Production in Central Pb-Pb Collisions at √sNN=2.76 TeV , 2012, 1208.1974.

[58]  E. Iancu.  The Color Glass Condensate , 2003 .

[59]  Raju Venugopalan,et al.  Comparison of the color glass condensate to dihadron correlations in proton-proton and proton-nucleus collisions , 2013, 1302.7018.

[60]  Johannes Ranft,et al.  The Monte Carlo Event Generator DPMJET-III , 2000 .

[61]  T. B. Skaali,et al.  Long-range angular correlations of pi, K and p in p-Pb collisions at root s(NN)=5.02 TeV , 2013 .

[62]  M. Z. Mehta,et al.  Study of the inclusive production of charged pions, kaons, and protons in pp collisions at $\sqrt{s} = 0.9, 2.76,\mbox{ and }7~\mbox{TeV}$ , 2012 .

[63]  E. Shuryak.  Quark-gluon plasma and hadronic production of leptons, photons and psions , 1978 .

[64]  S. Chatrchyan,et al.  Study of the production of charged pions, kaons, and protons in pPb collisions at $s_NN = $ 5.02 $text TeV$ , 2014 .

[65]  S. Porteboeuf-Houssais,et al.  Jets, Bulk Matter, and their Interaction in Heavy Ion Collisions at Several TeV , 2012, 1203.5704.

[66]  B. Wyslouch,et al.  First Results from Pb+Pb Collisions at the LHC , 2012, 1202.3233.

[67]  G. Paic,et al.  Color reconnection and flowlike patterns in pp collisions. , 2013, Physical review letters.

[68]  I.C.Park,et al.  Phobos results on charged particle multiplicity and pseudorapidity distributions in Au+Au, Cu+Cu, d+Au, and p+p collisions at ultra-relativistic energies , 2010, 1011.1940.

[69]  A. Andronic,et al.  Thermal hadron production in relativistic nuclear collisions: The hadron mass spectrum, the horn, and the QCD phase transition , 2008, 0812.1186.