Abstract
We report the measured transverse momentum (pT) spectra of primary charged particles from pp, p-Pb and Pb-Pb collisions at a center-of-mass energy \( \sqrt{s_{\mathrm{NN}}}=5.02 \) TeV in the kinematic range of 0.15 < pT< 50 GeV/c and |η| < 0.8. A significant improvement of systematic uncertainties motivated the reanalysis of data in pp and Pb-Pb collisions at \( \sqrt{s_{\mathrm{NN}}}=2.76 \) TeV, as well as in p-Pb collisions at \( \sqrt{s_{\mathrm{NN}}}=5.02 \) TeV, which is also presented. Spectra from Pb-Pb collisions are presented in nine centrality intervals and are compared to a reference spectrum from pp collisions scaled by the number of binary nucleon-nucleon collisions. For central collisions, the pT spectra are suppressed by more than a factor of 7 around 6–7 GeV/c with a significant reduction in suppression towards higher momenta up to 30 GeV/c. The nuclear modification factor RpPb, constructed from the pp and p-Pb spectra measured at the same collision energy, is consistent with unity above 8 GeV/c. While the spectra in both pp and Pb-Pb collisions are substantially harder at \( \sqrt{s_{\mathrm{NN}}}=5.02 \) TeV compared to 2.76 TeV, the nuclear modification factors show no significant collision energy dependence. The obtained results should provide further constraints on the parton energy loss calculations to determine the transport properties of the hot and dense QCD matter.

References
J. Bjorken, Energy loss of energetic Partons in quark-gluon plasma: possible extinction of high p T jets in hadron-hadron collisions, FERMILAB-PUB-82-059-T (1982).
JET collaboration, K.M. Burke et al., Extracting the jet transport coefficient from jet quenching in high-energy heavy-ion collisions, Phys. Rev. C 90 (2014) 014909 [arXiv:1312.5003] [INSPIRE].
C. Loizides, J. Kamin and D. d’Enterria, Improved Monte Carlo Glauber predictions at present and future nuclear colliders, Phys. Rev. C 97 (2018) 054910 [arXiv:1710.07098] [INSPIRE].
PHENIX collaboration, K. Adcox et al., Suppression of hadrons with large transverse momentum in central Au+Au collisions at \( \sqrt{s_{NN}}=130 \) GeV, Phys. Rev. Lett. 88 (2002) 022301 [nucl-ex/0109003] [INSPIRE].
STAR collaboration, C. Adler et al., Centrality dependence of high p T hadron suppression in Au+Au collisions at \( \sqrt{s_{NN}}=130 \) GeV, Phys. Rev. Lett. 89 (2002) 202301 [nucl-ex/0206011] [INSPIRE].
PHENIX collaboration, A. Adare et al., Suppression pattern of neutral pions at high transverse momentum in Au+Au collisions at \( \sqrt{s_{NN}}=200 \) GeV and constraints on medium transport coefficients, Phys. Rev. Lett. 101 (2008) 232301 [arXiv:0801.4020] [INSPIRE].
ALICE collaboration, Suppression of charged particle production at large transverse momentum in central Pb-Pb collisions at \( \sqrt{s_{NN}}=2.76 \) TeV, Phys. Lett. B 696 (2011) 30 [arXiv:1012.1004] [INSPIRE].
ALICE collaboration, Centrality dependence of charged particle production at large transverse momentum in Pb-Pb collisions at \( \sqrt{s_{NN}}=2.76 \) TeV, Phys. Lett. B 720 (2013) 52 [arXiv:1208.2711] [INSPIRE].
CMS collaboration, Study of high-p T charged particle suppression in Pb-Pb compared to pp collisions at \( \sqrt{s_{NN}}=2.76 \) TeV, Eur. Phys. J. C 72 (2012) 1945 [arXiv:1202.2554] [INSPIRE].
ATLAS collaboration, Measurement of charged-particle spectra in Pb+Pb collisions at \( \sqrt{s_{NN}}=2.76 \) TeV with the ATLAS detector at the LHC, JHEP 09 (2015) 050 [arXiv:1504.04337] [INSPIRE].
CMS collaboration, Charged-particle nuclear modification factors in PbPb and pPb collisions at \( \sqrt{s_{NN}}=5.02 \) TeV, JHEP 04 (2017) 039 [arXiv:1611.01664] [INSPIRE].
ALICE collaboration, Transverse momentum distribution and nuclear modification factor of charged particles in p-Pb collisions at \( \sqrt{s_{NN}}=5.02 \) TeV, Phys. Rev. Lett. 110 (2013) 082302 [arXiv:1210.4520] [INSPIRE].
ALICE collaboration, Transverse momentum dependence of inclusive primary charged-particle production in p-Pb collisions at \( \sqrt{s_{NN}}=5.02 \) TeV, Eur. Phys. J. C 74 (2014) 3054 [arXiv:1405.2737] [INSPIRE].
CMS collaboration, Nuclear effects on the transverse momentum spectra of charged particles in pPb collisions at \( \sqrt{s_{NN}}=5.02 \) TeV, Eur. Phys. J. C 75 (2015) 237 [arXiv:1502.05387] [INSPIRE].
ATLAS collaboration, Transverse momentum, rapidity and centrality dependence of inclusive charged-particle production in \( \sqrt{s_{NN}}=5.02 \) TeV p+Pb collisions measured by the ATLAS experiment, Phys. Lett. B 763 (2016) 313 [arXiv:1605.06436] [INSPIRE].
ALICE collaboration, Energy dependence of the transverse momentum distributions of charged particles in pp collisions measured by ALICE, Eur. Phys. J. C 73 (2013) 2662 [arXiv:1307.1093] [INSPIRE].
ALICE collaboration, Centrality dependence of the charged-particle multiplicity density at midrapidity in Pb-Pb collisions at \( \sqrt{s_{NN}}=5.02 \) TeV, Phys. Rev. Lett. 116 (2016) 222302 [arXiv:1512.06104] [INSPIRE].
ALICE collaboration, The ALICE experiment at the CERN LHC, 2008 JINST 3 S08002 [INSPIRE].
ALICE collaboration, Performance of the ALICE Experiment at the CERN LHC, Int. J. Mod. Phys. A 29 (2014) 1430044 [arXiv:1402.4476] [INSPIRE].
ALICE collaboration, ALICE Inner Tracking System (ITS): technical design report, CERN-LHCC-99-012 (1999).
ALICE collaboration, ALICE time projection chamber: technical design report, CERN-LHCC-2000-001 (2000).
ALICE collaboration, Centrality determination in heavy ion collisions, ALICE-PUBLIC-2018-011 (2018).
ALICE collaboration, Measurement of the cross section for electromagnetic dissociation with neutron emission in Pb-Pb collisions at \( \sqrt{s_{NN}}=2.76 \) TeV, Phys. Rev. Lett. 109 (2012) 252302 [arXiv:1203.2436] [INSPIRE].
C. Loizides and A. Morsch, Absence of jet quenching in peripheral nucleus-nucleus collisions, Phys. Lett. B 773 (2017) 408 [arXiv:1705.08856] [INSPIRE].
D. Kharzeev, E. Levin and M. Nardi, Color glass condensate at the LHC: Hadron multiplicities in pp, pA and AA collisions, Nucl. Phys. A 747 (2005) 609 [hep-ph/0408050] [INSPIRE].
W.-T. Deng, X.-N. Wang and R. Xu, Hadron production in p+p, p+Pb and Pb+Pb collisions with the HIJING 2.0 model at energies available at the CERN Large Hadron Collider, Phys. Rev. C 83 (2011) 014915 [arXiv:1008.1841] [INSPIRE].
ALICE collaboration, Centrality dependence of particle production in p-Pb collisions at \( \sqrt{s_{NN}}=5.02 \) TeV, Phys. Rev. C 91 (2015) 064905 [arXiv:1412.6828] [INSPIRE].
ALICE collaboration, The ALICE definition of primary particles, ALICE-PUBLIC-2017-005 (2017).
ALICE collaboration, Measurement of inelastic, single- and double-diffraction cross sections in proton-proton collisions at the LHC with ALICE, Eur. Phys. J. C 73 (2013) 2456 [arXiv:1208.4968] [INSPIRE].
ALICE collaboration, ALICE luminosity determination for pp collisions at \( \sqrt{s}=5 \) TeV, ALICE-PUBLIC-2016-005 (2016).
T. Sjöstrand, S. Mrenna and P.Z. Skands, A brief introduction to PYTHIA 8.1, Comput. Phys. Commun. 178 (2008) 852 [arXiv:0710.3820] [INSPIRE].
P. Skands, S. Carrazza and J. Rojo, Tuning PYTHIA 8.1: the Monash 2013 Tune, Eur. Phys. J. C 74 (2014) 3024 [arXiv:1404.5630] [INSPIRE].
R. Brun et al., GEANT: detector description and simulation tool, CERN-W5013 (1993).
X.-N. Wang and M. Gyulassy, HIJING: a Monte Carlo model for multiple jet production in p-p, p-A and A-A collisions, Phys. Rev. D 44 (1991) 3501 [INSPIRE].
ALICE collaboration, Measurement of pion, kaon and proton production in proton-proton collisions at \( \sqrt{s}=7 \) TeV, Eur. Phys. J. C 75 (2015) 226 [arXiv:1504.00024] [INSPIRE].
ALICE collaboration, Multiplicity dependence of charged pion, kaon and (anti)proton production at large transverse momentum in p-Pb collisions at \( \sqrt{s_{NN}}=5.02 \) TeV, Phys. Lett. B 760 (2016) 720 [arXiv:1601.03658] [INSPIRE].
ALICE collaboration, Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions, Nature Phys. 13 (2017) 535 [arXiv:1606.07424] [INSPIRE].
ALICE collaboration, Production of Σ(1385)± and Ξ(1530)0 in proton-proton collisions at \( \sqrt{s}=7 \) TeV, Eur. Phys. J. C 75 (2015) 1 [arXiv:1406.3206] [INSPIRE].
ALICE collaboration, Production of Σ(1385)± and Ξ(1530)0 in p-Pb collisions at \( \sqrt{s_{NN}}=5.02 \) TeV, Eur. Phys. J. C 77 (2017) 389 [arXiv:1701.07797] [INSPIRE].
ALICE collaboration, Multiplicity dependence of pion, kaon, proton and Λ production in p-Pb collisions at \( \sqrt{s_{NN}}=5.02 \) TeV, Phys. Lett. B 728 (2014) 25 [arXiv:1307.6796] [INSPIRE].
ALICE collaboration, Centrality dependence of π, K, p production in Pb-Pb collisions at \( \sqrt{s_{NN}}=2.76 \) TeV, Phys. Rev. C 88 (2013) 044910 [arXiv:1303.0737] [INSPIRE].
ALICE collaboration, K 0 S and Λ production in Pb-Pb collisions at \( \sqrt{s_{NN}}=2.76 \) TeV, Phys. Rev. Lett. 111 (2013) 222301 [arXiv:1307.5530] [INSPIRE].
ALICE collaboration, Production of charged pions, kaons and protons at large transverse momenta in pp and Pb-Pb collisions at \( \sqrt{s_{NN}}=2.76 \) TeV, Phys. Lett. B 736 (2014) 196 [arXiv:1401.1250] [INSPIRE].
ALICE collaboration, Centrality dependence of the nuclear modification factor of charged pions, kaons and protons in Pb-Pb collisions at \( \sqrt{s_{\mathrm{NN}}}=2.76 \) TeV, Phys. Rev. C 93 (2016) 034913 [arXiv:1506.07287] [INSPIRE].
A.A. Bylinkin and A.A. Rostovtsev, Parametrization of the shape of hadron-production spectra in high-energy particle interactions, Phys. Atom. Nucl. 88 (2012) 999.
D. de Florian et al., Parton-to-kaon fragmentation revisited, Phys. Rev. D 95 (2017) 094019 [arXiv:1702.06353] [INSPIRE].
S. Roesler, R. Engel and J. Ranft, The Monte Carlo event generator DPMJET-III, in the proceedings of Monte Carlo 2000 — Advanced Monte Carlo for radiation physics, particle transport simulation and applications (MC2000), October 23–26, Lisbon, Portugal (2000), hep-ph/0012252 [SLAC-PUB-8740].
E. Schnedermann, J. Sollfrank and U.W. Heinz, Thermal phenomenology of hadrons from 200 A/GeV S+S collisions, Phys. Rev. C 48 (1993) 2462 [nucl-th/9307020] [INSPIRE].
G. D’Agostini, A multidimensional unfolding method based on Bayes’ theorem, Nucl. Instrum. Meth. A 362 (1995) 487 [INSPIRE].
T. Adye, Unfolding algorithms and tests using RooUnfold, in the proceedings of PHYSTAT 2011 Workshop on Statistical Issues Related to Discovery Claims in Search Experiments and Unfolding, January 17–20, CERN, Geneva, Switzerland (2011), arXiv:1105.1160 [INSPIRE].
R. Hagedorn, Multiplicities, p T distributions and the expected hadron → quark-gluon phase transition, Riv. Nuovo Cim. 6 (1983) 1 [INSPIRE].
Z.-W. Lin et al., A multi-phase transport model for relativistic heavy ion collisions, Phys. Rev. C 72 (2005) 064901 [nucl-th/0411110] [INSPIRE].
T. Pierog et al., EPOS LHC: test of collective hadronization with data measured at the CERN Large Hadron Collider, Phys. Rev. C 92 (2015) 034906 [arXiv:1306.0121] [INSPIRE].
J.W. Cronin, H.J. Frisch, M.J. Shochet, J.P. Boymond, R. Mermod, P.A. Piroue et al., Production of hadrons with large transverse momentum at 200, 300 and 400 GeV, Phys. Rev. D 11 (1975) 3105 [INSPIRE].