Transverse momentum dependence of inclusive primary charged-particle production in p–Pb collisions at √ s NN = 5.02 TeV

A. Baldisseri (1) , H. Borel (1) , J. Castillo Castellanos (1) , H. Pereira da Costa (1) , A. Rakotozafindrabe (1) , For The Alice Collaboration (2) , B. Abelev (3) , Laurent Aphecetche , Guillaume Batigne , I. Belikov , C. Cheshkov (4) , B. Cheynis (4) , H. Delagrange , L. Ducroux (4) , Magali Estienne , Marie Germain , J.-Y. Grossiord (4) , Maxime Guilbaud (4) , B. Hippolyte , C. Kuhn , A. Lardeux , A. Maire , Gines Martinez Garcia , J. Martin Blanco , A. Mas , L. Massacrier , L. Molnar , A. Morreale , Philippe Pillot , L. Ronflette , C. Roy , X. Sanchez Castro , Y. Schutz , Alexandre Shabetai , Diego Stocco , R. Tieulent (4) , A. Uras (4) , R. Vernet , M. Wang , Y. Zoccarato (4) , G. Conesa Balbastre , J. Faivre , C. Furget , R. Guernane , S. Kox , J.S. Real , C. Silvestre , Y.W. Baek , V. Barret , N. Bastid , A. Batista Camejo , P. Crochet , P. Dupieux , S. Li , X. Lopez , F. Manso , M. Marchisone , S. Porteboeuf-Houssais , P. Rosnet , B. Vulpescu , Z. Conesa del Valle , I. Das , B. Espagnon , C. Hadjidakis , I. Lakomov , C. Suire , D. Tapia Takaki J. , L. Valencia Palomo

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 CERN [Genève]
3 LLNL - Lawrence Livermore National Laboratory
4 IPNL - Institut de Physique Nucléaire de Lyon

The transverse momentum (p T) distribution of primary charged particles is measured at midrapidity in minimum-bias p–Pb collisions at √ s NN = 5.02 TeV with the ALICE detector at the LHC in the range 0.15 < p T < 50 GeV/c. The spectra are compared to the expectation based on binary collision scaling of particle production in pp colli-sions, leading to a nuclear modification factor consistent with unity for p T larger than 2 GeV/c, with a weak indication of a Cronin-like enhancement for p T around 4 GeV/c. The mea-surement is compared to theoretical calculations and to data in Pb–Pb collisions at √ s NN = 2.76 TeV. Measurements of particle production in proton-nucleus colli-sions at high energies enable the study of fundamental proper-ties of Quantum Chromodynamics (QCD) over a broad range of parton fractional momentum x and parton densities (see [1] for a review). They also provide reference measurements for the studies of deconfined matter created in nucleus–nucleus collisions [2]. The first measurements of charged-particle production in minimum-bias p–Pb collisions at the LHC at a centre-of-mass energy per nucleon-nucleon pair of √ s NN = 5.02 TeV

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

A. Baldisseri, H. Borel, J. Castillo Castellanos, H. Pereira da Costa, A. Rakotozafindrabe, et al.. Transverse momentum dependence of inclusive primary charged-particle production in p–Pb collisions at √ s NN = 5.02 TeV. European Physical Journal C: Particles and Fields, 2014, 74, pp.3054. ⟨10.1140/epjc/s10052-014-3054-5⟩. ⟨in2p3-00990047v2⟩