Direct virtual photon production in Au+Au collisions at sNN=200 GeV

STAR Collaboration

doi:10.1016/j.physletb.2017.04.050

Direct virtual photon production in Au+Au collisions at s_NN=200 GeV

STAR Collaboration

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

60 Citas (Scopus)

Resumen

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/c² for 0–80% minimum-bias Au+Au collisions at 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.

Idioma original	Inglés
Páginas (desde-hasta)	451-458
Número de páginas	8
Publicación	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volumen	770
DOI	https://doi.org/10.1016/j.physletb.2017.04.050
Estado	Publicada - 10 jul. 2017
Publicado de forma externa	Sí

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@article{293930aea2094df2bcad787e8968fa15,

title = "Direct virtual photon production in Au+Au collisions at sNN=200 GeV",

abstract = "We report the direct virtual photon invariant yields in the transverse momentum ranges 1T<3 GeV/c and 5T<10 GeV/c at mid-rapidity derived from the dielectron invariant mass continuum region 0.10ee<0.28 GeV/c2 for 0–80\% minimum-bias Au+Au collisions at sNN=200 GeV. A clear excess in the invariant yield compared to the nuclear overlap function TAA scaled p+p reference is observed in the pT range 1T<3 GeV/c. For pT>6 GeV/c the production follows TAA scaling. Model calculations with contributions from thermal radiation and initial hard parton scattering are consistent within uncertainties with the direct virtual photon invariant yield.",

author = "L. Adamczyk and Adkins, \{J. K.\} and G. Agakishiev and Aggarwal, \{M. M.\} and S. Kabana and \{STAR Collaboration\}",

note = "Publisher Copyright: {\textcopyright} 2017 The Author",

year = "2017",

month = jul,

day = "10",

doi = "10.1016/j.physletb.2017.04.050",

language = "English",

volume = "770",

pages = "451--458",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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TY - JOUR

T1 - Direct virtual photon production in Au+Au collisions at sNN=200 GeV

AU - Adamczyk, L.

AU - Adkins, J. K.

AU - Agakishiev, G.

AU - Aggarwal, M. M.

AU - Kabana, S.

AU - STAR Collaboration

PY - 2017/7/10

Y1 - 2017/7/10

N2 - We report the direct virtual photon invariant yields in the transverse momentum ranges 1T<3 GeV/c and 5T<10 GeV/c at mid-rapidity derived from the dielectron invariant mass continuum region 0.10ee<0.28 GeV/c2 for 0–80% minimum-bias Au+Au collisions at sNN=200 GeV. A clear excess in the invariant yield compared to the nuclear overlap function TAA scaled p+p reference is observed in the pT range 1T<3 GeV/c. For pT>6 GeV/c the production follows TAA scaling. Model calculations with contributions from thermal radiation and initial hard parton scattering are consistent within uncertainties with the direct virtual photon invariant yield.

AB - We report the direct virtual photon invariant yields in the transverse momentum ranges 1T<3 GeV/c and 5T<10 GeV/c at mid-rapidity derived from the dielectron invariant mass continuum region 0.10ee<0.28 GeV/c2 for 0–80% minimum-bias Au+Au collisions at sNN=200 GeV. A clear excess in the invariant yield compared to the nuclear overlap function TAA scaled p+p reference is observed in the pT range 1T<3 GeV/c. For pT>6 GeV/c the production follows TAA scaling. Model calculations with contributions from thermal radiation and initial hard parton scattering are consistent within uncertainties with the direct virtual photon invariant yield.

UR - https://www.scopus.com/pages/publications/85019187716

U2 - 10.1016/j.physletb.2017.04.050

DO - 10.1016/j.physletb.2017.04.050

M3 - Article

AN - SCOPUS:85019187716

SN - 0370-2693

VL - 770

SP - 451

EP - 458

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Direct virtual photon production in Au+Au collisions at sNN=200 GeV

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Direct virtual photon production in Au+Au collisions at s_NN=200 GeV