Double transverse spin asymmetry in the p{sup {up_arrow}}p{sup {up_arrow}} Drell-Yan process from Sivers functions
- Center of Subatomic Studies and Departamento de Fisica, Universidad Tecnica Federico Santa Maria, Casilla 110-V, Valparaiso (Chile)
- School of Physics and MOE Key Laboratory of Heavy Ion Physics, Peking University, Beijing 100871 (China)
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{sub T}/M{sup 2})(cos({phi}-{phi}{sub S{sub 1}})cos({phi}-{phi}{sub S{sub 2}})+3sin({phi}-{phi}{sub S{sub 1}})sin = ({phi}-{phi}{sub S{sub 2}})). The asymmetry is proportional to the product of two Sivers functions from each hadron f{sub 1T}{sup perpendicular(1)}xf{sub 1T}{sup perpendicular(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{sup {up_arrow}}p{sup {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{sub 1T}(x,k{sub T}{sup 2}), which can be extracted by the weighting function (Q{sub T}/M{sup 2})(3cos({phi}-{phi}{sub S{sub 1}})cos({phi}-{phi}{sub S{sub 2}})+sin({phi}-{phi}{sub S{sub 1}})sin = ({phi}-{phi}{sub S{sub 2}})), is also given at GSI.
- OSTI ID:
- 21020484
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 75, Issue 9; Other Information: DOI: 10.1103/PhysRevD.75.094012; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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