Production of the ρ(770)<SUP>0</SUP> meson in <i>pp</i> and Pb-Pb collisions at √<i>S<sub>NN</sub></i>=2.76 TeV



Acharya, S, Acosta, FT, Adamova, D, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahn, SU
et al (show 993 more authors) (2019) Production of the ρ(770)<SUP>0</SUP> meson in <i>pp</i> and Pb-Pb collisions at √<i>S<sub>NN</sub></i>=2.76 TeV. PHYSICAL REVIEW C, 99 (6). 064901-.

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Abstract

The production of the ρ(770)0 meson has been measured at midrapidity (|y|<0.5) in pp and centrality differential Pb-Pb collisions at sNN= 2.76 TeV with the ALICE detector at the Large Hadron Collider. The particles have been reconstructed in the ρ(770)0→π+π- decay channel in the transverse-momentum (pT) range 0.5-11 GeV/c. A centrality-dependent suppression of the ratio of the integrated yields 2ρ(770)0/(π++π-) is observed. The ratio decreases by ∼40% from pp to central Pb-Pb collisions. A study of the pT-differential 2ρ(770)0/(π++π-) ratio reveals that the suppression occurs at low transverse momenta, pT<2 GeV/c. At higher momentum, particle ratios measured in heavy-ion and pp collisions are consistent. The observed suppression is very similar to that previously measured for the K∗(892)0/K ratio and is consistent with EPOS3 predictions that may imply that rescattering in the hadronic phase is a dominant mechanism for the observed suppression.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 15 Aug 2019 08:49
Last Modified: 20 Jun 2024 19:00
DOI: 10.1103/PhysRevC.99.064901
Open Access URL: http://doi.org/10.1103/PhysRevC.99.064901
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3051804