Deuteron polarizations in the proton-deuteron Drell-Yan process for finding the gluon transversity
نویسندگان
چکیده
منابع مشابه
Structure functions in polarized proton-deuteron Drell-Yan processes
Polarized proton-deuteron (pd) Drell-Yan processes are investigated for studying new spin structure of a spin-1 hadron. Our formalism indicates that there exist many structure functions: 108 in general and 22 in the QT-integrated case. A naive parton model suggests that at least one of them should be related to the tensor polarized distributions, which have not been measured at all. There are s...
متن کاملPolarized proton-deuteron Drell-Yan processes and parton distributions
We show in general that there are 108 structure functions in the proton-deuteron Drell-Yan processes. However, there exist only 22 finite ones after integrating the cross section over the virtual-photon transverse momentum Q T or after taking the limit Q T → 0. There are 11 new structure functions in comparison with the ones of the proton-proton reactions, and they are related to the tensor str...
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We discuss the relation between the ratio of the proton-deuteron (pd) Drell-Yan cross section to the proton-proton (pp) one ∆(T )σpd/2∆(T )σpp and the flavor asymmetry in polarized light-antiquark distributions. Using a recent formalism of the polarized pd Drell-Yan process, we show that the difference between the pp and pd cross sections is valuable for finding not only the flavor asymmetry in...
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The complex Kohn variational principle and the (correlated) hyperspherical harmonics method are applied to study the proton–deuteron elastic scattering at energies above the deuteron breakup threshold. Results for the elastic cross section and various elastic polarization observables have been obtained by taking into account the long–range effect of the Coulomb interaction and using a realistic...
متن کاملTransversity distributions and Drell-Yan spin asymmetries
We discuss transversity distributions and Drell-Yan transverse double spin asymmetries. First, the antiquark flavor asymmetry ∆ T ¯ u/∆ T ¯ d is discussed by using two different descriptions, a meson-cloud model and a Pauli exclusion model. We find that both calculations produce a significant ∆ T ¯ d excess over ∆ T ¯ u. Next, we study its effects on the transverse spin asymmetry A T T and on t...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2020
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.101.094013