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Report No.

$$phi$$ meson production in the forward/backward rapidity region in Cu + Au collisions at $$sqrt{s_{NN}}$$ = 200 GeV

Adare, A.*; Hasegawa, Shoichi  ; Imai, Kenichi; Nagamiya, Shoji; Sako, Hiroyuki  ; Sato, Susumu ; Tanida, Kiyoshi  ; PHENIX Collaboration*; 505 of others*

The PHENIX experiment at the Relativistic Heavy Ion Collider has measured $$phi$$ meson production and its nuclear modification in asymmetric Cu + Au heavy-ion collisions at $$sqrt{s_{NN}}$$ = 200 GeV at both forward Cu-going direction (1.2 $$<$$ y $$<$$ 2.2) backward Au-going direction (-2.2 $$<$$ y $$<$$ -1.2) rapidities. The measurements are performed via the dimuon decay channel and reported as a function of the number of participating nucleons, rapidity, and transverse momentum. In the most central events, 0% - 20% centrality, the $$phi$$ meson yield integrated over 1 $$< p_T <$$ 5 GeV/$$c$$ prefers a smaller value, which means a larger nuclear modification, in the Cu-going direction compared to the Au-going direction. Additionally, the nuclear-modification factor in Cu + Au collisions averaged over all centrality is measured to be similar to the previous PHENIX result in $$d$$ + Au collisions for these rapidities.



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Category:Physics, Nuclear



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