On the normalization of unintegrated parton densities

Autor:	Guiot, Benjamin
Rok vydání:	2022
Předmět:	High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.107.014015
Popis:	Recently, the definitions of the Kimber-Martin-Ryskin-Watt (KMRW) unintegrated parton densities (UPDFs) have been discussed by several groups. In the first part of this manuscript, we remind the issues encountered with these definitions and discuss the proposed solutions. In our opinion, none of these solutions is fully satisfactory. We observe that these issues seem to be related to the normalization condition where the UPDFs are related to the collinear PDFs by an integration over transverse momentum cut off by the factorization scale. Then, we build a modified version of the angular-ordering KMRW UPDFs, obeying the normalization condition with the transverse momentum integrated up to infinity and show that the usual issues are absent. Comment: 19 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2205.02873 Zobrazit plný text záznamu View this record from Arxiv