Open-Charm Hadron Measurements in Au+Au Collisions at root s(NN) = 200 GeV by the STAR Experiment

0509939 - ÚJF 2020 RIV CH eng J - Článek v odborném periodiku
Vaněk, Jan
Open-Charm Hadron Measurements in Au+Au Collisions at root s(NN) = 200 GeV by the STAR Experiment.
Universe. Roč. 5, č. 9 (2019), č. článku 196. E-ISSN 2218-1997.
[18th Zimányi School. Budapest, 03.12.2018-07.12.2018]
Grant CEP: GA MŠMT EF16_013/0001569
Institucionální podpora: RVO:61389005
Klíčová slova: STAR collaboration * Quark-Gluon Plasma * open-charm hadrons * nuclear modification factor * eliptic flow * directed flow
Obor OECD: Particles and field physics
Impakt faktor: 1.752, rok: 2019
Způsob publikování: Open access
https://doi.org/10.3390/universe5090196

Study of the open-charm hadron production in heavy-ion collisions is crucial for understanding the properties of the Quark-Gluon Plasma. In these papers, we report on a selection of recent STAR measurements of open-charm hadrons in Au+Au collisions at . root s(NN) = 200 GeV, using the Heavy-Flavor Tracker. In particular, the nuclear modification factors of D-0 and D-+/- mesons, elliptic and directed flow of D-0 mesons, D-s/D-0 and Lambda(c)/D(0)yield ratios are discussed. The observed suppression of D(0 )and D-+/- mesons suggests strong interactions of the charm quarks with the QGP. The measured elliptic flow of D-0 mesons is large and follows the NCQ scaling, suggesting that charm quarks may be close to thermal equilibrium with the QGP medium. Both D-s/D-0 and Lambda(c) /D(0)yield ratios are found to be enhanced in Au+Au collisions. The enhancement can be explained by models incorporating coalescence hadronization of charm quarks. In addition, the directed flow of the D-0 mesons is measured to be negative and larger than that of light-flavor mesons which is in a qualitative agreement with hydrodynamic model predictions with a tilted QGP bulk.
Trvalý link: http://hdl.handle.net/11104/0300527