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EnglishThe 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.
Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN =2.76 TeV / Acharya, S; Adamova, D.; Adolfson, J; Aggarwal, M.; Rinella, G.; Agnello, M.; Agrawal, N; Bufalino, S.; Concas, M.; Grosa, F.; Ravasenga, I. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - STAMPA. - 99:6(2019), p. 064901.
| Titolo: | Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN =2.76 TeV |
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| Data di pubblicazione: | 2019 |
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| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevC.99.064901 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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