### Drell-Yan Non-Singlet Spin Cross Sections and Spin Asymmetry to $O(\alpha_s^2)$ (II)Drell-Yan Non-Singlet Spin Cross Sections and Spin Asymmetry to $O(\alpha_s^2)$ (II)

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 Author Chang, Sanghyeon ♦ Coriano, Claudio ♦ Field, R. D. Source arXiv.org Content type Text File Format PDF Date of Submission 1998-03-08 Language English
 Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics Subject Keyword High Energy Physics - Phenomenology ♦ physics:hep-ph Abstract We present predictions for the non-singlet Drell-Yan longitudinal spin cross sections and spin asymmetry, $A_{LL}$, in proton-proton collisions at large $p_T$ at the RHIC energy of $200\gev$ at next-to-leading order QCD. The higher order corrections to the non-singlet polarized cross section, $\sigma_{NS}^{LL}$, are sizeable and similar to those found for the unpolarized cross section. The non-singlet asymmetry parameter, $A^{NS}_{LL}$, is very stable against higher order corrections and is a direct measurement of the non-singlet (i.e. valence) polarized quark distributions within the proton. Description Reference: Nucl.Phys.B528:285-302,1998 Educational Use Research Learning Resource Type Article Page Count 24