D-Meson Azimuthal Anisotropy in Midcentral Pb-Pb Collisions √SNN=5.02 TeV

作者：Acharya, S.; Adamova, D.; Adolfsson, J.; Aggarwal, M. M.; Rinella, G. Aglieri; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, N.; Ahn, S. U.; Aiola, S.; Akindinov, A.; Alam, S. N.; Alba, J. L. B.; Albuquerque, D. S. D.; Aleksandrov, D.; Alessandro, B.; Alfaro Molina, R.; Alici, A.; Alkin, A.; Alme, J.; Alt, T.; Altenkamper, L.; Altsybeev, I.; Alves Garcia Prado, C.; Andrei, C.; Andreou, D.; Andrews, H. A.; Andronic, A.; Anguelov, V.; Anson, C.; Anticic, T.; Antinori, F.; Antonioli, P.; Anwar, R.

来源：Physical Review Letters, 2018, 120(10): 102301.

DOI：10.1103/PhysRevLett.120.102301

• RELATIVISTIC NUCLEAR COLLISIONS
• HEAVY-ION COLLISIONS
• FLAVOR HADRON DECAYS
• QUARKONIUM PRODUCTION
• ELLIPTIC FLOW
• ENERGY-LOSS
• CHARM
• COALESCENCE

The azimuthal anisotropy coefficient v(2) of prompt D-0, D+, D*+, and D-s(+) mesons was measured in midcentral (30%-50% centrality class) Pb-Pb collisions at a center-of-mass energy per nucleon pair root s(NN)=5.02 TeV, with the ALICE detector at the LHC. The D mesons were reconstructed via their hadronic decays at midrapidity, |y| < 0.8, in the transverse momentum interval 1 < p(T) < 24 GeV/c. The measured D-meson v(2) has similar values as that of charged pions. The D-s(+) v(2), measured for the first time, is found to be compatible with that of nonstrange D mesons. The measurements are compared with theoretical calculations of charm-quark transport in a hydrodynamically expanding medium and have the potential to constrain medium parameters.

• 出版日期2018-3-9
• 单位中国原子能科学研究院; 华中师范大学