Measurements of dielectron production in Au plus Au collisions at & RADIC;sNN=27, 39, and 62.4 GeV from the STAR experiment
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F23%3A00368615" target="_blank" >RIV/68407700:21340/23:00368615 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevC.107.L061901" target="_blank" >https://doi.org/10.1103/PhysRevC.107.L061901</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevC.107.L061901" target="_blank" >10.1103/PhysRevC.107.L061901</a>
Alternative languages
Result language
angličtina
Original language name
Measurements of dielectron production in Au plus Au collisions at & RADIC;sNN=27, 39, and 62.4 GeV from the STAR experiment
Original language description
We report systematic measurements of dielectron (e+e-) invariant-mass Mee spectra at midrapidity in Au + Au collisions at & RADIC;sNN = 27, 39, and 62.4 GeV taken with the STAR detector at the Relativistic Heavy Ion Collider. For all energies studied, a significant excess yield of dielectrons is observed in the low-mass region (0.40 < Mee < 0.75 MeV/c2) compared to hadronic cocktail simulations at freeze-out. Models that include an in-medium broadening of the p-meson spectral function consistently describe the observed excess. In addition, we report acceptance-corrected dielectron-excess spectra for Au + Au collisions at midrapidity (|yee| < 1) in the 0-80% centrality bin for each collision energy. The integrated excess yields for 0.4 < Mee < 0.75 GeV/c2, normalized by the charged particle multiplicity at midrapidity, are compared with previously published measure-& RADIC; ments for Au + Au at sNN = 19.6 and 200 GeV. Models that include an in-medium broadening of the p-meson spectral function consistently describe the observed excess. The normalized excess yields in the low-mass region show no significant collision energy dependence. The data, however, are consistent with model calculations that demonstrate a modest energy dependence.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PHYSICAL REVIEW C
ISSN
2469-9985
e-ISSN
2469-9993
Volume of the periodical
107
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
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UT code for WoS article
001023717500001
EID of the result in the Scopus database
2-s2.0-85162228817