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Dielectron measurements during heavy ion collisions at \(\sqrt {s_{NN} }\) = 200 GeV in the PHENIX experiment at RIHC

  • Proceedings of the International Conference “Nucleus-2012”. “Fundamental Problems of Nuclear Physics, Atomic Power Engineering and Nuclear Technologies” (The 62nd International Conference on Nuclear Spectroscopy and the Structure of Atomic Nuclei)
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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

The production of dielectron pairs is measured in PHENIX experiment during p + p, d + Au, Cu + Cu, and Au + Au collisions at \(\sqrt {s_{NN} }\) = 200 GeV. In the mass region between φ and J/ψ mesons, the yield is consistent with expectations from correlated production. In the mass region below φ mesons, the p + p and d+ Au spectra are well described by known contributions from light meson decays. In contrast, the Au + Au minimum bias spectrum in this region is enhanced by a factor of 4.7, concentrated at low p T < 1.5 GeV/s and rapidly rising with centrality. Existing theoretical models cannot describe the observed enhancement.

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Correspondence to Yu. G. Riabov.

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Original Russian Text © A.Ya. Berdnikov, D.A. Ivanishchev, D.O. Kotov, V.G. Riabov, Yu.G. Riabov, V.M. Samsonov, 2013, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2013, Vol. 77, No. 7, pp. 992–996.

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Berdnikov, A.Y., Ivanishchev, D.A., Kotov, D.O. et al. Dielectron measurements during heavy ion collisions at \(\sqrt {s_{NN} }\) = 200 GeV in the PHENIX experiment at RIHC. Bull. Russ. Acad. Sci. Phys. 77, 904–907 (2013). https://doi.org/10.3103/S1062873813070058

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  • DOI: https://doi.org/10.3103/S1062873813070058

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