Double transverse spin asymmetry in the p(up arrow)(p)over-bar(up arrow) Drell-Yan process from Sivers functions

作者：Lu Zhun; Ma Bo Qiang^*; Schmidt Ivan

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2007, 75(9): 094012.

DOI：10.1103/PhysRevD.75.094012

We show that the transverse double spin asymmetry in the Drell-Yan process contributed only from the Sivers functions can be picked out by the weighting function Q(T)/M-2(cos(phi-phi(S1))cos(phi-phi(S2))+3sin(phi-phi(S1))sin(phi-phi(S2))). The asymmetry is proportional to the product of two Sivers functions from each hadron f(1T)(perpendicular to(1))xf(1T)(perpendicular to(1)). Using two sets of Sivers functions extracted from the semi-inclusive deeply elastic scattering data at HERMES, we estimate this asymmetry in the p(up arrow)p(up arrow) Drell-Yan process which is possible to be performed in high energy storage ring at GSI. The prediction of double spin asymmetry in the Drell-Yan process contributed by the function g(1T)(x,k(T)(2)), which can be extracted by the weighting function Q(T)/M-2(3cos(phi-phi(S1))cos(phi-phi(S2))+sin(phi-phi(S1))sin(phi-phi(S2))), is also given at GSI.

• 出版日期2007-5
• 单位北京大学