Large impact parameter behaviour in the CGC/saturation approach: a new non-linear equation

Autor:	Gotsman, E., Levin, E.
Rok vydání:	2019
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Theory
Zdroj:	Phys. Rev. D 101, 014023 (2020)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.101.014023
Popis:	In this paper we propose a solution to the long standing problem in the CGC/saturation approach: the power-like fall off of the scattering amplitudes at large $b$. We propose a new non-linear equation, which takes into account random walks both in transverse momenta of the produced gluons and in their impact parameters. We demonstrate, that this equation is in accord with previous attempts to include the diffusion in impact parameters in the BFKL evolution equation. We show in the paper, that the solution to a new equation results in the exponential decrease of the scattering amplitude at large impact parameter, and in the restoration of the Froissart theorem. Comment: 27pp., 10 figures in pdf files
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1910.11662 Zobrazit plný text záznamu View this record from Arxiv