-meson production at forward and backward rapidity in and Cu + Au collisions at = 200 GeV

Aidala, C.*; 長谷川 勝一; 今井 憲一; 佐甲 博之; 佐藤 進; 谷田 聖; PHENIX Collaboration*; 他456名*

Physical Review C, 96(6), p.064901_1 - 064901_18, 2017/12

https://doi.org/10.1103/PhysRevC.96.064901

The fraction of mesons which come from B-meson decay, , is measured for J/ rapidity and in + and Cu+Au collisions at =200 GeV with the PHENIX detector. The extracted fraction is = 0.025 0.006(stat) 0.010(syst) for + collisions. For Cu+Au collisions, is 0.094 0.028(stat) 0.037(syst) in the Au-going direction () and 0.089 0.026(stat) 0.040(syst) in the Cu-going direction (). The nuclear modification factor, , of B mesons in Cu+Au collisions is consistent with binary scaling of measured yields in + at both forward and backward rapidity.