Study of the sign change of the Sivers function from STAR Collaboration W/Z production data

M. Anselmino, M. Boglione, U. D'Alesio +2

Recent data on the transverse single spin asymmetry $A_N$ measured by the STAR Collaboration for $p^{\uparrow }p\to W^{\pm }/Z^{0}X$ reactions at RHIC allow the first investigatio…