Beam Energy and Centrality Dependence of Direct-Photon Emission from Ultrarelativistic Heavy-Ion Collisions
A. Adare, S. Afanasiev, C. Aidala, N. N. Ajitanand et autres
The PHENIX collaboration presents first measurements of low-momentum ($0.4<{p}_{T}<3\text{ }\text{ }\mathrm{GeV}/c$) direct-photon yields from $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{NN}}=39$ and 62.4 GeV. For both beam energies the direct-photon yields are substantially enhanced with respect to expectations from prompt processes, similar to the yields …
us, ru, jp, fr, hu, de, kr, tw, in, se, il (code pays fourni par la source)
55 citations
Physical Review Letters