Measurements of dielectron production in Au plus Au collisions at root s(NN)=200 GeV from the STAR experiment

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F15%3A00448887" target="_blank" >RIV/61389005:_____/15:00448887 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/15:00236427
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevC.92.024912" target="_blank" >http://dx.doi.org/10.1103/PhysRevC.92.024912</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevC.92.024912" target="_blank" >10.1103/PhysRevC.92.024912</a>

Result language
angličtina
Original language name
Measurements of dielectron production in Au plus Au collisions at root s(NN)=200 GeV from the STAR experiment
Original language description
Measurements of the dielectron yield as a function of transverse momentum (p(T)) and collision centrality show an enhancement compared to a cocktail simulation of hadronic sources in the low invariant-mass region (M-ee < 1 GeV / c(2)). In minimum-bias collisions, in the invariant-mass range of 0.30-0.76 GeV / c(2), integrated over the full pT acceptance, the enhancement factor is 1.76 +/- 0.06 (stat.) +/- 0.26 (sys.) +/- 0.29 (cocktail). The enhancement factor exhibits weak centrality and pT dependence in STAR's accessible kinematic regions, while the excess yield in this invariant-mass region as a function of the number of participating nucleons follows a power-law shape with a power of 1.44 +/- 0.10. Models that assume an in-medium broadening of the rho-meson spectral function consistently describe the observed excess in these measurements. Additionally, we report on measurements of omega-and phi-meson production through their e+ e(-) decay channel. These measurements show good agreement with Tsallis blast-wave model predictions, as well as, in the case of the phi meson, results through its K+ K- decay channel.
Czech name
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Czech description
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Type
J<sub>x</sub> - 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
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

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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