Speaker
Sanghwa Park
(Stony Brook University)
Description
The measurement of the single spin asymmetry of parity violating W boson production in longitudinally polarized proton collisions provides unique and clean access to the light sea quark helicity distributions. The W boson couples only to left handed quark and right-handed anti quark, and hence one can directly relate the charge of the W with initial state quark flavors. The PHENIX experiment at RHIC has performed the single spin asymmetry measurements at √s = 510 GeV in 2011-2013. W bosons are accessed through their lepton decays at PHENIX, electrons at mid-rapidity (|η| < 0.35) and muons at forward rapidity (1.2 < |η| < 2.4). The analysis status and recent results will be presented.
