The three-dimensional distribution of quarks in momentum space

Abstract

We present the distribution of unpolarized quarks in a transversely polarized proton in three-dimensional momentum space. Our results are based on consistent extractions of the unpolarized and Sivers transverse momentum dependent parton distributions (TMDs).

Comments: Several changes compared to first version. Additional equations inserted, additional explanations, inclusion of normalization errors, inclusion of Z and W data points and corresponding plots. Results remained qualitatively similar to first version