Measurements of open charm hadrons at the STAR experiment

0492054 - ÚJF 2019 RIV GB eng C - Konferenční příspěvek (zahraniční konf.)
Šimko, Miroslav
Measurements of open charm hadrons at the STAR experiment.
Journal of Physics Conference Series. Vol. 832. Bristol: IOP, 2017, č. článku 012028. ISSN 1742-6588.
[Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus-Nucleus Collisions (HOT QUARKS 2016). South Padre Island, Texas (US), 12.09.2016-17.09.2016]
Grant CEP: GA MŠMT LG15001
Institucionální podpora: RVO:61389005
Klíčová slova: STAR * heavy ion collisions * mesons
Obor OECD: Particles and field physics

Because of their large masses, charm quarks are predominantly produced in the early stages of the heavy-ion collisions via hard scatterings. Therefore, they experience the entire evolution of the Quark-Gluon Plasma created in such collisions. Compared to light quarks, charm quarks thermalize more slowly. Therefore, the open charm hadrons present a unique probe to the properties of the hot and dense nuclear matter by measuring their energy loss and degree of thermalization in the medium. Furthermore, with the combined measurements of D-0 and D-s mesons, we can study multiple modes of coalescence of charm quarks with light quarks in heavy-ion collisions. Heavy Flavor Tracker at the STAR experiment enables full topological reconstruction of open charm hadrons which greatly improves measurements of D-0 mesons and opens the door to reconstructing the D-s mesons for the first time at RHIC. In this paper, we present the nuclear modification factor and azimuthal anisotropy for the D-0 and D-s mesons as well as the ratio of D-s/D-0 in Au+Au collisions at the center-of-mass energy root s(NN) = 200 GeV.
Trvalý link: http://hdl.handle.net/11104/0285630