Dielectron Mass Spectra from Au plus Au Collisions at root s(NN)=200 Ge V

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F14%3A00219296" target="_blank" >RIV/68407700:21340/14:00219296 - isvavai.cz</a>

Alternative codes found

RIV/61389005:_____/14:00433171

Result on the web

<a href="http://dx.doi.org/10.1103/PhysRevLett.113.022301" target="_blank" >http://dx.doi.org/10.1103/PhysRevLett.113.022301</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.113.022301" target="_blank" >10.1103/PhysRevLett.113.022301</a>

Result language

angličtina

Original language name

Dielectron Mass Spectra from Au plus Au Collisions at root s(NN)=200 Ge V

Original language description

We report the STAR measurements of dielectron (e(+)e(-)) production at midrapidity (vertical bar y(ee)vertical bar < 1) in Au + Au collisions at root s(NN) = 200 GeV. The measurements are evaluated in different invariant mass regions with a focus on 0.30-0.76 (rho-like), 0.76-0.80 (omega-like), and 0.98-1.05 (phi-like) GeV/c(2). The spectrum in the omega-like and phi-like regions can be well described by the hadronic cocktail simulation. In the rho-like region, however, the vacuum rho spectral functioncannot describe the shape of the dielectron excess. In this range, an enhancement of 1.77 +/- 0.11(stat) +/- 0.24(syst) +/- 0.33(cocktail) is determined with respect to the hadronic cocktail simulation that excludes the rho meson. The excess yield in therho-like region increases with the number of collision participants faster than the omega and phi yields. Theoretical models with broadened rho contributions through interactions with constituents in the hot QCD medium provide a consiste

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BG - Nuclear, atomic and molecular physics, accelerators

OECD FORD branch

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Project

<a href="/en/project/GA13-20841S" target="_blank" >GA13-20841S: Study of nuclear matter in ultra-relativistic heavy-ion collisions at RHIC</a><br>

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

PHYSICAL REVIEW LETTERS

ISSN

0031-9007

e-ISSN

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Volume of the periodical

113

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

7

Pages from-to

1-7

UT code for WoS article

000338743400004

EID of the result in the Scopus database

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