Longitudinal parity-violating asymmetry in hadronic decays of weak bosons in polarized proton collisions

Berger, Edmond L.
Nadolsky, Pavel M.
Journal Title
Journal ISSN
Volume Title
We investigate the possible measurement of parity-violating spin asymmetries in jet pair production in proton-proton collisions at the Brookhaven Relativistic Heavy Ion Collider (RHIC), with the goal to constrain longitudinally polarized quark and antiquark distribution functions. A measurable asymmetry could be observed in the vicinity of the massive weak W boson resonance, where the parity-violating signal appears above the parity-conserving background and is enhanced by interference of the strong and electroweak production amplitudes. We discuss the potential for such measurements, perhaps the first opportunity to measure a parity-violating asymmetry in proton-proton collisions at RHIC. Sensitivity of this measurement to the polarization of down-type antiquarks is demonstrated.
Comment: 16 pages, 6 figures; accepted by Phys. Rev. D; extended discussion of the sensitivity of A_L to the down-type antiquark PDF and other minor modifications
High Energy Physics - Phenomenology