Sea Quark Measurements at RHIC (Jinlong Zhang)

Tuesday 5 Feb 2019, 11:00 → 12:00 US/Eastern

Polarized proton-proton collision experiments at RHIC have provided unique opportunities to study the spin structure of the nucleon. One of the primary motivations of RHIC spin program is to probe sea quark spin-flavor structure via W-boson production in proton-proton collisions at a center of mass energy of 500 GeV. Measurements of the longitudinal single-spin asymmetry, A_L, of W-bosons with the STAR detector have provided significant constraints on the polarized parton distribution functions and especially the first experimental indication of a flavor asymmetry of polarized sea. In this seminar, I will present the analyses and latest results from STAR, as well as their impact on our knowledge of the sea quark helicity distributions.