Direct virtual photon production in Au plus Au collisions at root s(NN)=200 GeV STAR Collaboration
Result description
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.
Keywords
The result's identifiers
Result code in IS VaVaI
Alternative codes found
RIV/68407700:21340/17:00318507
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Direct virtual photon production in Au plus Au collisions at root s(NN)=200 GeV STAR Collaboration
Original language description
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.
Czech name
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Czech description
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Classification
Type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physics Letters. B
ISSN
0370-2693
e-ISSN
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Volume of the periodical
770
Issue of the periodical within the volume
JUL
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
8
Pages from-to
451-458
UT code for WoS article
000404196500059
EID of the result in the Scopus database
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Basic information
Result type
Jimp - Article in a specialist periodical, which is included in the Web of Science database
OECD FORD
Nuclear physics
Year of implementation
2017