$\cos 2\varphi$ asymmetries in unpolarized semi-inclusive DIS

Abstract

We use the Boer-Mulders functions parameterized from unpolarized $p+D$ Drell-Yan data by the FNAL E866/NuSea Collaboration combined with recently extracted Collins functions to calculate the $\cos 2\varphi$ asymmetries in unpolarized semi-inclusive deeply inelastic scattering (SIDIS) processes both for ZEUS at Hadron Electron Ring Accelerator (HERA) and Jefferson Lab experiments (JLab), and to compare our results with their data. We also give predictions for the $\cos 2\varphi$ asymmetries of SIDIS in the kinematical regime of HERMES Collaboration, and the forthcoming JLab experiments. We predict that the $\cos 2\varphi$ asymmetries of semi-inclusive ${\pi }^{-}$ production are somewhat larger than that of ${\pi }^{+}$ production. We suggest to measure these two processes separately, which will provide more detail information on the Boer-Mulders functions as well as on the Collins functions.

9 latex pages, 18 figures, to appear in PRD

References in corpus (10)

• Matches and mismatches in the descriptions of semi-inclusive processes at low and high transverse momentum
• Transverse Quark Spin Effects and the Flavor Dependence of the Boer-Mulders Function
• Measurement of Angular Distributions of Drell-Yan Dimuons in p + d Interaction at 800 GeV/c
• Are all Boer-Mulders functions alike?
• Transverse momentum dependence of semi-inclusive pion production
• A systematic phenomenological study of the $\cos 2\varphi$ asymmetry in unpolarized semi--inclusive DIS
• Extracting Boer-Mulders functions from $p+D$ Drell-Yan processes
• Flavor separation of the Boer-Mulders function from unpolarized ${\pi }^{-}p$ and ${\pi }^{-}D$ Drell-Yan processes
• Transverse spin effects of sea quarks in unpolarized nucleons
• Azimuthal single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarised hydrogen target

Cited by in corpus (2)

• Measurement of Angular Distributions of Drell-Yan Dimuons in $p+p$ Interactions at 800 GeV/c
• Semi-inclusive processes at low and high transverse momentum