Rapidity evolution of TMDs with running coupling
arXiv:2205.03119 · doi:10.1103/PhysRevD.106.034007
Abstract
The scale of a coupling constant for rapidity-only evolution of transverse-momentum dependent (TMD) operators in the Sudakov kinematic region is calculated using the Brodsky-Lepage-Mackenzie (BLM) optimal scale setting. The effective argument of a coupling constant is halfway in the logarithmical scale between the transverse momentum and energy of TMD distribution. The resulting rapidity-only evolution equation is solved for quark and gluon TMDs.
arXiv commentIt matches the published version: appendix extended, 1 figure added, typos corrected; 40 pages, 9 figures
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