Constraining quark angular momentum through semi-inclusive measurements

Autor:	Bacchetta, Alessandro, Radici, Marco
Rok vydání:	2011
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.107.212001
Popis:	The determination of quark angular momentum requires the knowledge of the generalized parton distribution E in the forward limit. We assume a connection between this function and the Sivers transverse-momentum distribution, based on model calculations and theoretical considerations. Using this assumption, we show that it is possible to fit at the same time nucleon magnetic moments and semi-inclusive single-spin asymmetries. This imposes additional constraints on the Sivers function and opens a plausible way to quantifying quark angular momentum. Comment: 4 pages, 1 figure. Version 2 is similar to publised version, has minor changes in text and bibliography, and the final values of angular momentum are quoted at a different scale compared to Version 1
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1107.5755 Zobrazit plný text záznamu View this record from Arxiv