Abstract

Invariant transverse momentum spectra and nuclear modification factors of K*(892) mesons are measured in Cu + Au collisions at the energy of 200 GeV. The measurements are performed in five centrality bins in the transverse momentum range of 2.0 to 5.75 GeV c^–1 in the PHENIX experiment at RHIC. The nuclear modification factors are compared to the earlier PHENIX data obtained for symmetric Cu + Cu systems at \(\sqrt {{{s}_{{NN}}}} \) = 200 GeV. The nuclear modification factors of K* mesons in Cu + Cu and Cu + Au collisions at identical N_part (number of participants) have a similar shape.

中文翻译：

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在200 GeV下测量Cu + Au碰撞中的K *（892）介子

摘要

在200 GeV的能量下，在Cu + Au碰撞中测量了K *（892）介子的不变横向动量谱和核修饰因子。在RHIC的PHENIX实验中，在五个动量范围为2.0至5.75 GeV c ^–1的横向动量范围内进行测量。将核修饰因子与\（\ sqrt {{{s} _ {{{NN}}}} \） = 200 GeV下从对称Cu + Cu系统获得的早期PHENIX数据进行比较。在相同的N_部分（参与人数），Cu + Cu和Cu + Au碰撞中K *介子的核修饰因子具有相似的形状。