26-30 March 2012
University of Bonn
Europe/Berlin timezone

Constraining quark angular momentum with the Sivers function

28 Mar 2012, 16:30
Lecture Hall, Institute for Physical Chemistry (University of Bonn)

Lecture Hall, Institute for Physical Chemistry

University of Bonn

Spin physics Spin physics


Alessandro Bacchetta (University of Pavia)


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.

Primary author

Alessandro Bacchetta (University of Pavia)


Presentation materials