First Observation of the Directed Flow of D-0 and <(D-0)over cap> in Au +Au Collisions at root s(NN)=200 GeV

0509996 - ÚJF 2020 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 - Chaloupka, P. - Holub, L. - Kocan, M. - Kosarzewski, L. K. - Kramárik, L. - Líčeník, Robert - Matonoha, O. - Moravcová, Z. - Rusňák, Jan - Rusňáková, O. - Šimko, Miroslav - Šumbera, Michal - Vaněk, Jan … celkem 346 autorů
First Observation of the Directed Flow of D-0 and <(D-0)over cap> in Au +Au Collisions at root s(NN)=200 GeV.
Physical Review Letters. Roč. 123, č. 16 (2019), č. článku 162301. ISSN 0031-9007. E-ISSN 1079-7114
Grant CEP: GA MŠMT LTT18002
Institucionální podpora: RVO:61389005
Klíčová slova: STAR collaboration * heavy ion collisions * RHIC
Obor OECD: Nuclear physics
Impakt faktor: 8.385, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevLett.123.162301

We report the first measurement of rapidity-odd directed flow (v(1)) for D-0 and <(D-0)over cap> mesons at midrapidity (vertical bar y vertical bar < 0.8) in Au + Au collisions at. root s(NN )= 200 GeV using the STAR detector at the Relativistic Heavy Ion Collider. In 10-80% Au + Au collisions, the slope of the v(1) rapidity dependence (dv(1)/dy), averaged over D-0 and <(D-0)over cap> mesons, is -0.080 +/- 0.017(stat) +/- 0.016(syst) for transverse momentum p(T) above 1.5 GeV/c. The absolute value of D-0 meson dv(1)/dy is about 25 times larger than that for charged kaons, with 3.4 sigma significance. These data give a unique insight into the initial tilt of the produced matter, and offer constraints on the geometric and transport parameters of the hot QCD medium created in relativistic heavy-ion collisions.
Trvalý link: http://hdl.handle.net/11104/0300568