The cos 2 phi asymmetry of Drell-Yan and J/psi production in unpolarized ppbar scattering

Abstract

We investigate the cos 2 phi azimuthal asymmetry in Drell--Yan and J/psi production from unpolarized ppbar scattering at GSI-HESR energies. The contribution to this asymmetry arising from the leading-twist Boer-Mulders function h_1^perp(x, k_T^2), which describes a correlation between the transverse momentum and the transverse spin of quarks in an unpolarized hadron, is explicitly evaluated, and predictions for the GSI-HESR kinematic regime are presented. We show that the cos 2 phi asymmetry is quite sizable both on the J/psi peak and in the Drell-Yan continuum region. Therefore these processes may offer an experimentally viable access to the Boer-Mulders function in the early unpolarized stage of GSI experiments.

5 pages, 3 figures, to be published in Eur. Phys. J

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Cited by in corpus (17)

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• Dilepton production from polarized hadron hadron collisions
• Intrinsic transverse parton momenta in deeply inelastic reactions
• The Boer-Mulders effect in unpolarized SIDIS: an analysis of the COMPASS and HERMES data on the $\cos 2\varphi$ asymmetry
• Pion TMDs in light-front constituent approach, and Boer-Mulders effect in the pion-induced Drell-Yan process
• A systematic phenomenological study of the $\cos 2\varphi$ asymmetry in unpolarized semi--inclusive DIS
• $J/\psi$ Production in Polarized and Unpolarized $ep$ Collision and Sivers and $\cos 2\varphi$ Asymmetries
• Naive time-reversal odd phenomena in semi-inclusive deep-inelastic scattering from light-cone constituent quark models
• Azimuthal asymmetries in unpolarized Drell-Yan processes and the Boer-Mulders distributions of antiquarks
• Updating Boer-Mulders functions from unpolarized pd and pp Drell-Yan data
• Azimuthal asymmetries in lepton-pair production at a fixed-target experiment using the LHC beams (AFTER)
• T-odd effects in photon-jet production at the Tevatron
• Boer-Mulders effect in the unpolarized pion induced Drell-Yan process at COMPASS within TMD factorization
• Boer-Mulders function of pion meson and $q_T$-weighted $\cos 2\varphi$ asymmetry in the unpolarized ${\pi }^{-}p$ Drell-Yan at COMPASS
• The $\cos 2\varphi$ azimuthal asymmetry of unpolarized dilepton production at the $Z$-pole
• On duality of Drell-Yan and J/psi production processes
• SPD - the Spin Physics Project with Polarized Proton and Deuteron Beams at the NICA Collider