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Výbor pro spolupráci ČR se Spojeným ústavem jaderných výzkumů Přihlášení
Elliptic flow of electrons from heavy-flavor hadron decays in Au plus Au collisions at root s(NN)=200, 62.4, and 39 GeV

Autor
Adamczyk L. AGH University of Science and Technology, Poland
Lednický Richard, promovaný fyzik DrSc. dr. h. c. Fyzikální ústav AV ČR, SÚJV Dubna
et al.  STAR collaboration

Rok
2017

Časopis
Physical Review C, 95 (3), 034907

Web


Obsah
We present measurements of elliptic flow (v2) of electrons from the decays of heavy-flavor hadrons (eHF) by the STAR experiment. For Au+Au collisions at √sNN=200 GeV we report v2, for transverse momentum (pT) between 0.2 and 7 GeV/c, using three methods: the event plane method (v2{EP}), two-particle correlations (v2{2}), and four-particle correlations (v2{4}). For Au+Au collisions at √sNN=62.4 and 39 GeV we report v2{2} for pT<2GeV/c. v2{2} and v2{4} are nonzero at low and intermediate pT at 200 GeV, and v2{2} is consistent with zero at low pT at other energies. The v2{2} at the two lower beam energies is systematically lower than at √sNN=200 GeV for pT<1GeV/c. This difference may suggest that charm quarks interact less strongly with the surrounding nuclear matter at those two lower energies compared to √sNN=200 GeV.

Příklad citace článku:
L. Adamczyk, R. Lednický, . et al., "Elliptic flow of electrons from heavy-flavor hadron decays in Au plus Au collisions at root s(NN)=200, 62.4, and 39 GeV", Physical Review C, 95 (3), 034907 (2017)