English

Gluon saturation scale from the KGBJS equation

High Energy Physics - Phenomenology 2013-11-13 v1

Abstract

The CCFM equation and its extended form with a quadratic term (KGBJS equation) are solved with fixed and running coupling constant. The solution of the KGBJS equation is compared to gluon densities resulting from the CCFM and BK equations. As the saturation scale QsQ_s now becomes available as a function of the hard scale pp we observe that low values of pp impede its growth with 1x\frac 1 x. Also, at values much larger than partons transversal momentum the saturation effects become independent on the hard scale what we call liberation of saturation scale. We also introduce the hard-scale-related saturation scale PsP_s and investigate its energy dependence. We observe that the new scale as a function of xx decreases starting from the value of transversal momentum of gluon.

Keywords

Cite

@article{arxiv.1306.3369,
  title  = {Gluon saturation scale from the KGBJS equation},
  author = {Krzysztof Kutak and Dawid Toton},
  journal= {arXiv preprint arXiv:1306.3369},
  year   = {2013}
}
R2 v1 2026-06-22T00:33:52.543Z