Two-loop splitting in double parton distributions: the colour non-singlet case

Journal of High Energy Physics

J. R. Gaunt¹  M. Diehl²  P. Plößl² 

[1] Department of Physics and Astronomy, University of Manchester, M13 9PL, Manchester, U.K.;Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany;

关键词: NLO Computations;   

DOI  :  10.1007/JHEP08(2021)040

来源: Springer

【 摘 要 】

At small inter-parton distances, double parton distributions receive their dominant contribution from the splitting of a single parton. We compute this mechanism at next-to-leading order in perturbation theory for all colour configurations of the observed parton pair. Rapidity divergences are handled either by using spacelike Wilson lines or by applying the δ regulator. We investigate the behaviour of the two-loop contributions in different kinematic limits, and we illustrate their impact in different channels.

【 授权许可】

CC BY