Production of charged pions, kaons and (anti-)protons in Pb-Pb and inelastic pp collisions at $\sqrt{_{NN}}=$ 5.02 TeV
Authors:
- S. Acharya,
- Daniel Dąbrowski,
- Kamil Deja,
- Łukasz Graczykowski,
- Monika Jakubowska,
- Małgorzata Janik,
- Przemysław Karczmarczyk,
- Adam Kisiel,
- Julian Myrcha,
- Piotr Nowakowski,
- Janusz Oleniacz,
- Jan Pluta,
- Przemysław Rokita,
- Krystian Rosłon,
- Tomasz Trzciński,
- Hanna Zbroszczyk
Abstract
Midrapidity production of π±, K± and ($\overline{p}$)p measured by the ALICE experiment at the LHC, in Pb-Pb and inelastic pp collisions at $\sqrt{s_{NN}} = 5.02$ TeV, is presented. The invariant yields are measured over a wide transverse momentum (pT) range from hundreds of MeV/c up to 20 GeV/c. The results in Pb-Pb collisions are presented as a function of the collision centrality, in the range 0-90%. The comparison of the pT-integrated particle ratios, i.e. proton-to-pion (p/π) and kaon-to-pion (K/π) ratios, with similar measurements in Pb-Pb collisions at $\sqrt{s_{NN}}= 5.02$ TeV show no significant energy dependence. Blast-wave fits of the pT spectra indicate that in the most central collisions radial flow is slightly larger at 5.02 TeV with respect to 2.76 TeV. Particle ratios (p/π, K/π) as a function of pT show pronounced maxima at pT ≈ 3 GeV/c in central Pb-Pb collisions. At high pT, particle ratios at 5.02 TeV are similar to those measured in pp collisions at the same energy and in Pb-Pb collisions at $\sqrt{s_{NN}}= 5.02$ TeV. Using the pp reference spectra measured at the same collision energy of 5.02 TeV, the nuclear modification factors for the different particle species are derived. Within uncertainties, the nuclear modification factor is particle species independent for high pT and compatible with measurements at $\sqrt{s_{NN}} = 5.02$ TeV. The results are compared to state-of-the-art model calculations, which are found to describe the observed trends satisfactorily.
- Record ID
- WUT869fec9ccd934cceba188518d5358a33
- Author
- Total number of authors
- 1033
- Collective author
- The ALICE Collaboration
- Journal series
- Physical Review C, ISSN 2469-9985, e-ISSN 2469-9993, [1538-4497]
- Issue year
- 2020
- Vol
- 101
- No
- 4
- Pages
- 1-27
- Publication size in sheets
- 1.30
- Article number
- 044907
- Keywords in English
- relativistic heavy ion physics ; quark gluon plasma ; particle and resonance production ; experimental results
- ASJC Classification
- DOI
- DOI:10.1103/PhysRevC.101.044907 Opening in a new tab
- URL
- https://journals.aps.org/prc/abstract/10.1103/PhysRevC.101.044907 Opening in a new tab
- Language
- (en) English
- Score (nominal)
- 140
- Score source
- journalList
- Score
- = 140.0, 03-05-2022, ArticleFromJournal
- Publication indicators
- = 44; = 53; : 2020 (2 years) = 3.296 - 2020 (5 years) =3.103
- Uniform Resource Identifier
- https://repo.pw.edu.pl/info/article/WUT869fec9ccd934cceba188518d5358a33/
- URN
urn:pw-repo:WUT869fec9ccd934cceba188518d5358a33
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.