Abstract.
In this paper, we study and predict the charged-particle pseudorapidity multiplicity density (\( \frac{\mathrm{d} N_{ch}}{\mathrm{d}\eta}\)), transverse momentum spectra of identified particles and their ratios in relativistic heavy ion collisions at the Large Hadron Collider (LHC), using the string-melting version of a multi-phase transport (AMPT) model with an improved quark coalescence method. We extend this improved AMPT model to the energy region available in the experiment and test its validity, in particular, by predicting the experimental observables. Results of the charged-particle pseudorapidity multiplicity density from AMPT model calculations for Pb+Pb collisions at \( \sqrt{s_{NN}}=5.02\) TeV are compared with the experimental data. Good agreements are generally found between the theoretical calculations and experimental data. But for Xe+Xe collisions at \( \sqrt{s_{NN}}=5.44\) TeV, the \( \frac{\mathrm{d} N_{ch}}{\mathrm{d}\eta}\) are systematically overestimated by 20% at different centralities with the same model parameters. We predict the \( p_T\) spectra of charged pions, kaons and protons as well as their ratios \( K/\pi\) and \( p/\pi\) at midrapidity (\( \vert y\vert < 0.5\)) in both Pb+Pb collisions at \( \sqrt{s_{NN}}=5.02\) TeV and Xe+Xe collisions at \( \sqrt{s_{NN}}=5.44\) TeV that are measured at LHC. The \( p_T\) spectra of identified particles in Pb+Pb collisions from the improved AMPT model are compared and found to be consistent with results from the iEBE-VISHNU hybrid model with TRENTo initial condition.
Similar content being viewed by others
References
STAR Collaboration (M.M. Aggarwal et al.), Phys. Rev. C 83, 024901 (2011)
PHENIX Collaboration (A. Adare et al.), Phys. Rev. Lett. 101, 162301 (2008)
B.I. Abelev, M.M. Aggarwal, Z. Ahammed et al., Phys. Rev. Lett. 97, 152301 (2006)
ALICE Collaboration (J. Adam et al.), Phys. Rev. C 93, 034913 (2016)
ALICE Collaboration (J. Adam et al.), Phys. Lett. B 772, 567 (2017)
ALICE Collaboration (S. Acharya et al.), Phys. Lett. B 788, 166 (2019)
W. Zhao, H.J. Xu, H. Song, Eur. Phys. J. C 77, 645 (2017)
W. Zhao, L. Zhu, H. Zheng, C.M. Ko, H. Song, Phys. Rev. C 98, 054905 (2018)
W. Zhao, Y. Zhou, H. Xu, W. Deng, H. Song, Phys. Lett. B 780, 495 (2018)
P. Braun-Munzinger, K. Redlich, J. Stachel, Particle Production in Heavy Ion Collisions, in Quark-Gluon Plasma 3, edited by R.C. Hwa, X.-N. Wang (World Scientific, Singapore, 2004) p. 491
G.L. Ma, Z.W. Lin, Phys. Rev. C 93, 054911 (2016)
Y. He, Z.W. Lin, Phys. Rev. C 96, 014910 (2017)
V. Greco, C.M. Ko, P. Levai, Phys. Rev. Lett. 90, 202302 (2003)
R.J. Fries, B. Müller, C. Nonaka, S.A. Bass, Phys. Rev. Lett. 90, 202303 (2003)
R.C. Hwa, C.B. Yang, Phys. Rev. C 70, 024905 (2004)
B. Zhang, C.M. Ko, B.A. Li, Z.w. Lin, Phys. Rev. C 61, 067901 (2000)
Z.W. Lin, C.M. Ko, B.A. Li, B. Zhang, S. Pal, Phys. Rev. C 72, 064901 (2005)
Z.w. Lin, S. Pal, C.M. Ko, B.A. Li, B. Zhang, Phys. Rev. C 64, 011902 (2001)
L. Zhu, C.M. Ko, X. Yin, Phys. Rev. C 92, 064911 (2015)
ALICE Collaboration (S. Acharya et al.), Phys. Lett. B 790, 35 (2019)
ALICE Collaboration (S. Ragoni), PoS LHCP2018, 085 (2018)
G. Giacalone, J. Noronha-Hostler, M. Luzum, J.Y. Ollitrault, Phys. Rev. C 97, 034904 (2018)
S. Tripathy, S. De, M. Younus, R. Sahoo, Phys. Rev. C 98, 064904 (2018)
C. Shen, Z. Qiu, H. Song, J. Bernhard, S. Bass, U. Heinz, Comput. Phys. Commun. 199, 61 (2016)
K.J. Eskola, H. Niemi, R. Paatelainen, K. Tuominen, Phys. Rev. C 97, 034911 (2018)
B.G. Zakharov, Eur. Phys. J. C 78, 427 (2018)
X.N. Wang, M. Gyulassy, Phys. Rev. D 44, 3501 (1991)
B.A. Li, C.M. Ko, Phys. Rev. C 52, 2037 (1995)
ALICE Collaboration (B. Abelev et al.), Phys. Rev. C 88, 044909 (2013)
S. Kundu, D. Mallick, B. Mohanty, Eur. Phys. J. A 55, 157 (2019)
J. Xu, C.M. Ko, Phys. Rev. C 83, 034904 (2011)
ALICE Collaboration (S. Acharya et al.), JHEP 11, 013 (2018)
H. Song, U.W. Heinz, Phys. Lett. B 658, 279 (2008)
H. Song, PhD Thesis, The Ohio State University (August 2009) arXiv:0908.3656
S.A. Bass et al., Prog. Part. Nucl. Phys. 41, 255 (1998)
M. Bleicher et al., J. Phys. G 25, 1859 (1999)
X. Zhu, Y. Zhou, H. Xu, H. Song, Phys. Rev. C 95, 044902 (2017)
H.J. Xu, Z. Li, H. Song, Phys. Rev. C 93, 064905 (2016)
ALICE Collaboration (B. Abelev et al.), Phys. Rev. C 88, 044910 (2013)
ALICE Collaboration (H. Beck), arXiv:1502.00848 [nucl-ex]
Author information
Authors and Affiliations
Corresponding author
Additional information
Communicated by F. Gulminelli
Data Availability Statement
This manuscript has no associated data or the data will not be deposited. [Authors’ comment: All data generated during this study are contained in this published article and numerical data files are available upon request.]
Publisher’s Note
The EPJ Publishers remain neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Zhu, L., Zheng, H. & Kong, R. Centrality and transverse momentum dependencies of hadrons in Pb+Pb collisions at \(\sqrt{s_{NN}} = 5.02\) TeV and Xe+Xe collisions at \(\sqrt{s_{NN}} = 5.44\) TeV from a multi-phase transport model. Eur. Phys. J. A 55, 205 (2019). https://doi.org/10.1140/epja/i2019-12903-3
Received:
Accepted:
Published:
DOI: https://doi.org/10.1140/epja/i2019-12903-3