Comprehensive studies of ϒ inclusive production in Z boson decay

Journal of High Energy Physics

Hong Fei Zhang¹  Zhan Sun² 

[1] College of Big Data Statistics, Guizhou University of Finance and Economics, 550025, Guiyang, People’s Republic of China;Department of Physics, Guizhou Minzu University, 550025, Guiyang, People’s Republic of China;

关键词: NLO Computations;    QCD Phenomenology;   

DOI  :  10.1007/JHEP06(2021)152

来源: Springer

【 摘 要 】

In this paper, we present a comprehensive study of ϒ inclusive production in Z boson decay, including the first complete next-to-leading-order calculations of the color-octet (CO) contributions. With the inclusion of the newly-calculated remarkable QCD corrections, the CO processes exhibit crucially phenomenological influence on the existing predictions built on the color-singlet mechanism. We also include the exhaustive evaluations of the feed-down contributions, which remained ignored in the literature, and find them to be considerable. Summing up all the contributions, the ℬZ → ϒ(nS) + X still notably undershoot the data released by the L3 Collaboration.

【 授权许可】

CC BY