Production of K*(892)(0) and phi(1020) in pp and Pb-Pb collisions at root s(NN)=5.02 TeV



Acharya, S, Adamova, D, Adler, A, Adolfsson, J, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU
et al (show 1016 more authors) (2022) Production of K*(892)(0) and phi(1020) in pp and Pb-Pb collisions at root s(NN)=5.02 TeV. PHYSICAL REVIEW C, 106 (3). 034907-.

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Abstract

The production of K∗(892)0 and φ(1020) mesons in proton-proton (pp) and lead-lead (Pb-Pb) collisions at sNN = 5.02 TeV has been measured using the ALICE detector at the Large Hadron Collider (LHC). The transverse momentum (pT) distributions of K∗(892)0 and φ(1020) mesons have been measured at midrapidity (|y|<0.5) up to pT= 20 GeV/c in inelastic pp collisions and for several Pb-Pb collision centralities. The collision centrality and collision energy dependence of the average transverse momenta agree with the radial flow scenario observed with stable hadrons, showing that the effect is stronger for more central collisions and higher collision energies. The K∗0/K ratio is found to be suppressed in Pb-Pb collisions relative to pp collisions: this indicates a loss of the measured K∗(892)0 signal due to rescattering of its decay products in the hadronic phase. In contrast, for the longer-lived φ(1020) mesons, no such suppression is observed. The nuclear modification factors (RAA) of K∗(892)0 and φ(1020) mesons are calculated using pp reference spectra at the same collision energy. In central Pb-Pb collisions for pT > 8 GeV/c, the RAA values of K∗(892)0 and φ(1020) are below unity and observed to be similar to those of pions, kaons, and (anti)protons. The RAA values at high pT (>8 GeV/c) for K∗(892)0 and φ(1020) mesons are in agreement within uncertainties for sNN= 5.02 and 2.76 TeV.

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 05 May 2023 09:07
Last Modified: 14 Mar 2024 20:54
DOI: 10.1103/PhysRevC.106.034907
Open Access URL: https://doi.org/10.1103/PhysRevC.106.034907
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3170212