Double transverse spin asymmetry in the $p^\uparrow\bar{p}^\uparrow$ Drell-Yan process from Sivers functions

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dc.creatorLu, Zhun
dc.creatorMa, Bo-Qiang
dc.creatorSchmidt, Ivan
dc.date2007-04-18
dc.date.accessioned2026-07-07T10:20:17Z
dc.date.available2026-07-07T10:20:17Z
dc.descriptionWe show that the transverse double spin asymmetry (DSA) in the Drell-Yan process contributed only from the Sivers functions can be picked out by the weighting function $\frac{Q_T}{M^2}(\cos(ϕ-ϕ_{S_1})\cos(ϕ-ϕ_{S_2})+3\sin(ϕ-ϕ_{S_1})\sin(ϕ-ϕ_{S_2}))$. The asymmetry is proportional to the product of two Sivers functions from each hadron $f_{1T}^{\perp(1)}\times f_{1T}^{\perp (1)}$. Using two sets of Sivers functions extracted from the semi-inclusive deeply elastic scattering data at HERMES, we estimate this asymmetry in the $p^\uparrow\bar{p}^\uparrow$ Drell-Yan process which is possible to be performed in HESR at GSI. The prediction of DSA in the Drell-Yan process contributed by the function $g_{1T}(x,\Vec k_T^2)$, which can be extracted by the weighting function $\frac{Q_T}{M^2}(3\cos(ϕ-ϕ_{S_1})\cos(ϕ-ϕ_{S_2})+\sin(ϕ-ϕ_{S_1})\sin(ϕ-ϕ_{S_2}))$, is also given at GSI.
dc.description6 latex pages, 2 figures, to appear in PRD
dc.identifierhttps://arxiv.org/abs/0704.2292
dc.identifierhttp://arxiv.org/abs/0704.2292
dc.identifierPhys.Rev.D75:094012,2007
dc.identifierdoi:10.1103/PhysRevD.75.094012
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/174799
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDouble transverse spin asymmetry in the $p^\uparrow\bar{p}^\uparrow$ Drell-Yan process from Sivers functions
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