中国物理学会高能物理分会第十一届全国会员代表大会暨学术年会

To account for the acceptance effect of two-particle correlations, a normalization is performed in pioneer work. We propose a normalization scheme based on an independent particle assumption to improve the background estimation. Choosing per-trigger yield calculated by CGC as an example, a comparison of the background proposed in this paper with that in pioneer work is made. The differences between the two backgrounds are demonstrated to be small. However, the resulting per- trigger yield normalized by the two backgrounds show qualitative differences, i.e. different trends as a function of ∆y. The one normalized by the background of this paper shows better agreements with data. The normalization does not affect the yield as a function of ∆φ and thus the agreement of the per-trigger yield as a function of ∆φ with the experimental data is maintained.