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.

Acharya S., Acosta F.T.-., Adamova D., Adolfsson J., Aggarwal M.M., Aglieri Rinella G., et al. (2019). Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN =2.76 TeV. PHYSICAL REVIEW C, 99(6), 1-20 [10.1103/PhysRevC.99.064901].

Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN =2.76 TeV

Alici A.;Arcelli S.;Bellini F.;Carnesecchi F.;Cifarelli L.;Colocci M.;Jacazio N.;Scioli G.;
2019

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.
2019
Acharya S., Acosta F.T.-., Adamova D., Adolfsson J., Aggarwal M.M., Aglieri Rinella G., et al. (2019). Production of the ρ(770)0 meson in pp and Pb-Pb collisions at sNN =2.76 TeV. PHYSICAL REVIEW C, 99(6), 1-20 [10.1103/PhysRevC.99.064901].
Acharya S.; Acosta F.T.-.; Adamova D.; Adolfsson J.; Aggarwal M.M.; Aglieri Rinella G.; Agnello M.; Agrawal N.; Ahammed Z.; Ahn S.U.; Aiola S.; Akindi...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/727660
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