Measurement of the longitudinal spin asymmetries for weak boson production in proton-proton collisions at s=510GeV Academic Article uri icon

abstract

  • 2019 authors. Published by the American Physical Society. We report new STAR measurements of the single-spin asymmetries AL for W+ and W- bosons produced in polarized proton-proton collisions at s=510 GeV as a function of the decay-positron and decay-electron pseudorapidity. The data were obtained in 2013 and correspond to an integrated luminosity of 250 pb-1. The results are combined with previous results obtained with 86 pb-1. A comparison with theoretical expectations based on polarized lepton-nucleon deep-inelastic scattering and prior polarized proton-proton data suggests a difference between the and d quark helicity distributions for 0.05

published proceedings

  • Physical Review D

author list (cited authors)

  • Adam, J., Adamczyk, L., Adams, J. R., Adkins, J. K., Agakishiev, G., Aggarwal, M. M., ... Zyzak, M.

publication date

  • January 1, 2019 11:11 AM