Abstract
Contributions of sea quark and gluon spins to the proton spin in Drell-Jahn processes and direct production of photons in proton-proton and proton-antiproton collisions are studied in the present work. Analytical expressions for two-spin asymmetries \(A_{LL}^{DY}\) and \(A_{LL}^{\gamma }\) are derived. In both processes, these asymmetries are studied and analyzed as functions of the kinematic variables τ, x T, and x F. Measurements of two-spin asymmetries \(A_{LL}^{DY}\) and \(A_{LL}^{\gamma }\) make it possible to determine the individual contributions of sea quark and gluon spins to the proton spin.
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Muradov, R.K., Akhmedov, A.I. & Burdzhaliev, R.M. Contribution of Sea Quarks and Gluons to the Proton Spin. Russian Physics Journal 43, 695–702 (2000). https://doi.org/10.1023/A:1026699323014
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DOI: https://doi.org/10.1023/A:1026699323014