φ meson production in d + Au collisions at sNN =200 GeV

Adare, A. and Aidala, C. and Ajitanand, N. N. and Akiba, Y. and Al-Bataineh, H. and Csanád, Máté and Csörgő, Tamás and Kiss, Ádám and Nagy, Márton and Novák, Tamás and Sziklai, János István and Vértesi, Róbert (2015) φ meson production in d + Au collisions at sNN =200 GeV. PHYSICAL REVIEW C, 92 (4). ISSN 2469-9985

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Abstract

The PHENIX collaboration has measured φ meson production in d+Au collisions at √sN N = 200 GeV using the dimuon and dielectron decay channels. The φ meson is measured in the forward (backward) d-going (Au-going) direction, 1.2 < y < 2.2 (−2.2 < y < −1.2) in the transverse- momentum (pT ) range from 1–7 GeV/c, and at midrapidity |y| < 0.35 in the pT range below 7 GeV/c. The φ meson invariant yields and nuclear-modification factors as a function of pT , rapidity, and centrality are reported. An enhancement of φ meson production is observed in the Au-going direction, while suppression is seen in the d-going direction, and no modification is observed at midrapidity relative to the yield in p+p collisions scaled by the number of binary collisions. Similar behavior was previously observed for inclusive charged hadrons and open heavy flavor indicating similar cold-nuclear-matter effects.

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