Abstract
The production of and mesons in proton-proton () and lead-lead (Pb-Pb) collisions at has been analyzed using a high luminosity data sample accumulated in 2011 with the ALICE detector at the Large Hadron Collider (LHC). Transverse momentum () spectra have been measured for and mesons via their hadronic decay channels for up to . The measurements in collisions have been compared to model calculations and used to determine the nuclear modification factor and particle ratios. The ratio exhibits significant reduction from to central Pb-Pb collisions, consistent with the suppression of the yield at low due to rescattering of its decay products in the hadronic phase. In central Pb-Pb collisions the dependent and ratios show an enhancement over collisions for , consistent with previous observations of strong radial flow. At high , particle ratios in Pb-Pb collisions are similar to those measured in collisions. In central Pb-Pb collisions, the production of and mesons is suppressed for . This suppression is similar to that of charged pions, kaons, and protons, indicating that the suppression does not depend on particle mass or flavor in the light quark sector.
3 More- Received 17 February 2017
DOI:https://doi.org/10.1103/PhysRevC.95.064606
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©2017 CERN, for the ALICE Collaboration