Estimate on Spin Asymmetry for Drell-Yan Process at Fermilab with Tensor-Polarized Deuteron

Abstract

There are four new structure functions for the spin-1 deuteron in comparison with the ones for the spin-1/2 proton, and they are called $b_1$, $b_2$, $b_3$, and $b_4$. The twist-2 structure functions $b_1$ and $b_2$ are expressed by tensor-polarized parton distribution functions in the deuteron. HERMES measurements of $b_1$ are much different from the prediction of the standard deuteron model with D-state admixture. It indicates that the structure functions $b_1$ and $b_2$ probe an interesting new aspect in the deuteron. There is an approved experiment at JLab to measure $b_1$ and it is expected to start in 2019. On the other hand, the measurement of tensor-polarized distributions is under consideration at Fermilab by the Drell-Yan process with the unpolarized proton beam and tensor-polarized deuteron target. It is expected to provide crucial information on tensor-polarized antiquark distributions. Since the distributions are small quantities, it is important to estimate the tensor-polarized spin asymmetry theoretically to find experimental feasibility for an actual proposal at Fermilab.

arXiv comment4 pages, 3 eps figures, to be published in JPS Conf. Proc., Proceedings of the 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2016), July 25-30, 2016, Kyoto, Japan

References in corpus (11)

• Parton distributions for the LHC
• First Measurement of the Tensor Structure Function $b_1$ of the Deuteron
• Pionic and Hidden-Color, Six-Quark Contributions to the Deuteron b1 Structure Function
• Structure functions in the polarized Drell-Yan processes with spin-1/2 and spin-1 hadrons: II. parton model
• Tensor-polarized quark and antiquark distribution functions in a spin-one hadron
• Structure functions in the polarized Drell-Yan processes with spin-1/2 and spin-1 hadrons: I. general formalism
• Nonvanishing tensor polarization of sea quarks in polarized deuterons
• The Double Scattering Contribution to $b_1(x,Q^2)$ in the Deuteron
• Polarized deuteron structure functions at small x
• Theoretical estimate on tensor-polarization asymmetry in proton-deuteron Drell-Yan process
• Tensor-polarized structure functions: Tensor structure of deuteron in 2020's

Cited by in corpus (1)

• Mellin moments of spin dependent and independent PDFs of the pion and rho meson