Direct virtual photon production in Au plus Au collisions at root s(NN)=200 GeV STAR Collaboration

Adamczyk, L.; Bielčík, J.; Bielčíková, Jana; Chaloupka, P.; Federič, Pavol; Federičová, P.; Harlenderová, A.; Kocmánek, Martin; Kvapil, J.; Lidrych, J.; Rusňák, Jan; Rusňáková, O.; Šaur, Miroslav; Šimko, Miroslav; Šumbera, Michal; Trzeciak, B. A.

doi:https://dx.doi.org/10.1016/j.physietb.2017.04.050

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Direct virtual photon production in Au plus Au collisions at root s(NN)=200 GeV STAR Collaboration

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SYSNO ASEP	0477399
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Direct virtual photon production in Au plus Au collisions at root s(NN)=200 GeV STAR Collaboration
Author(s)	Adamczyk, L. (PL) Bielčík, J. (CZ) Bielčíková, Jana (UJF-V)_{RID, ORCID, SAI} Chaloupka, P. (CZ) Federič, Pavol (UJF-V)_{ORCID, SAI} Federičová, P. (CZ) Harlenderová, A. (CZ) Kocmánek, Martin (UJF-V) Kvapil, J. (CZ) Lidrych, J. (CZ) Rusňák, Jan (UJF-V)_{RID, ORCID, SAI} Rusňáková, O. (CZ) Šaur, Miroslav (UJF-V) Šimko, Miroslav (UJF-V)_{ORCID, SAI} Šumbera, Michal (UJF-V)_{RID, ORCID, SAI} Trzeciak, B. A. (CZ)
Number of authors	349
Source Title	Physics Letters. B. - : Elsevier - ISSN 0370-2693 Roč. 770, JUL (2017), s. 451-458
Number of pages	8 s.
Publication form	Print - P
Language	eng - English
Country	NL - Netherlands
Keywords	STAR collaboration ; transverse mementum ; Au Au collisions
Subject RIV	BG - Nuclear, Atomic and Molecular Physics, Colliders
OECD category	Nuclear physics
R&D Projects	LG15001 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	LM2015054 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UJF-V - RVO:61389005
UT WOS	000404196500059
DOI	10.1016/j.physietb.2017.04.050
Annotation	We report the direct virtual photon invariant yields in the transverse momentum ranges 1 < P-T < 3 GeV/c and 5 < p(T) < 10 GeV/c at mid-rapidity derived from the dielectron invariant mass continuum region 0.10 < M-ee < 0.28 GeV/c(2) for 0-80% minimum-bias Au+Au collisions at root s(NN) = 200 GeV. A clear excess in the invariant yield compared to the nuclear overlap function T-AA scaled p + p reference is observed in the p(T) range 1 < P-T < 3 GeV/c. For P-T > 6 GeV/c the production follows T-AA scaling. Model calculations with contributions from thermal radiation and initial hard parton scattering are consistent within uncertainties with the direct virtual photon invariant yield.
Workplace	Nuclear Physics Institute
Contact	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Year of Publishing	2018

Number of the records: 1