Effects of chain decays, radial flow and U
A(1) restoration on the low-mass dilepton enhancement in $$\sqrt {s_{NN} } = 200$$ GeV Au+Au reactions

• Authors: Márton Vargyas , Tamás Csörgő , Róbert Vértesi
• Languages of publication: EN

Abstracts

EN

In $$\sqrt {s_{NN} } = 200$$ GeV Au+Au collisions PHENIX reported a significant enhancement in the low-mass region (0.1 < m
ee < 0.7 GeV) of the dielectron spectrum, which is still not fully understood. Several theoretical works and an indirect measurement suggest, due to the possible restoration of the U
A(1) part of the chiral symmetry in a hot and dense medium, that the mass of the η′ meson may substantially decrease. This work reports on a statistically acceptable description of the PHENIX low-mass dilepton enhancement using a radial flow dominated meson spectra, chain decays of long-lived resonances and an in-medium η′ mass modification.

Keywords

EN

Brookhaven RHIC Coll; Heavy Ion; Dilepton production; Collective flow; Phase transition

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2013
• Volume: 11
• Issue: 5
• Pages: 553-559

Dates

published

1 - 5 - 2013

online

28 - 7 - 2013

Contributors

author

Márton Vargyas

• Eötvös Loránd University, Pázmány Péter sétány 1/a., 1117, Budapest, Hungary

author

Tamás Csörgő

• Wigner Research Centre for Physics of the Hungarian Academy of Sciences, Konkoly-Thege Miklós út 29-33., 1121, Budapest, Hungary

author

Róbert Vértesi

• Nuclear Physics Institute of The Academy of Sciences of the Czech Republic, 25068, Řež, Czech Republic

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Identifiers

DOI

10.2478/s11534-013-0249-6