Observation of D-s(+/-)/D-0 Enhancement in Au plus Au Collisions at root s(NN)=200 GeV

0545194 - ÚJF 2022 RIV US eng J - Článek v odborném periodiku
Adam, J. - Adamczyk, L. - Adams, J. R. - Adkins, J. K. - Agakishiev, G. - Bielčík, J. - Bielčíková, Jana - Federič, Pavol - Holub, L. - Chaloupka, P. - Kocan, M. - Kosarzewski, L. K. - Kramárik, L. - Líčeník, Robert - Moravcová, Z. - Rusňák, Jan - Šimko, Miroslav - Šumbera, Michal - Vaněk, Jan … celkem 361 autorů
Observation of D-s(+/-)/D-0 Enhancement in Au plus Au Collisions at root s(NN)=200 GeV.
Physical Review Letters. Roč. 127, č. 9 (2021), č. článku 092301. ISSN 0031-9007. E-ISSN 1079-7114
Grant CEP: GA MŠMT LTT18002
Výzkumná infrastruktura: BNL-CZ II - 90109
Institucionální podpora: RVO:61389005
Klíčová slova: STAR collaboration * heavy ion collisions
Obor OECD: Particles and field physics
Impakt faktor: 9.185, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevLett.127.092301

We report on the first measurement of charm-strange meson D-s(+/-) production at midrapidity in Au + Au collisions at root s(NN) = 200 GeV from the STAR experiment. The yield ratio between strange (D-s(+/-)) and nonstrange (D-0) open-charm mesons is presented and compared to model calculations. A significant enhancement, relative to a PYTHIA simulation of p + p collisions, is observed in the D-s(+/-)/D-0 yield ratio in Au + Au collisions over a large range of collision centralities. Model calculations incorporating abundant strange-quark production in the quark-gluon plasma and coalescence hadronization qualitatively reproduce the data. The transverse-momentum integrated yield ratio of D-s(+/-)/D-0 at midrapidity is consistent with a prediction from a statistical hadronization model with the parameters constrained by the yields of light and strange hadrons measured at the same collision energy. These results suggest that the coalescence of charm quarks with strange quarks in the quark-gluon plasma plays an important role in D-s(+/-)-meson production in heavy-ion collisions.
Trvalý link: http://hdl.handle.net/11104/0321929