On the kinematic constraint in BFKL near threshold region

We introduce a modified Balitskii-Fadin-Kuraev-Lipatov (BFKL) equation with the rapidity veto that originates from external kinematic constraint. Though it is a formally sub-leading power contribution, such kinematic effect becomes very important especially in the threshold region, where there is no...

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Bibliographic Details
Published inarXiv.org
Main Authors Hao-yu, Liu, Xiao-hui, Liu, Shi, Yu, Du-xin, Zheng, Zhou, Jian
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 01.04.2022
Subjects
Kinematics
Particle production
Transverse momentum
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Summary:We introduce a modified Balitskii-Fadin-Kuraev-Lipatov (BFKL) equation with the rapidity veto that originates from external kinematic constraint. Though it is a formally sub-leading power contribution, such kinematic effect becomes very important especially in the threshold region, where there is no sufficient phase space for the small \(x\) evolution to be fully developed. We also investigate the phenomenological consequences of the kinematic constraint BFKL equation in the forward particle production processes in pp and eA collisions. It is shown that particle yield at large transverse momentum is significantly suppressed in the threshold region.
ISSN:2331-8422