[Jlab-seminars] Physics Seminar Notice

[Linda Ceraul]

Physics Seminar
March 14, 2-13
1:00 PM
Room F224-225

Dr. Sook Hyun Lee
State University of New York

"Longitudinal Spin Physics at PHENIX (RHIC)"

The spin of the proton is known to be 1/2ħ. Although its angular momentum sum rule in terms of constituent quark and gluon components has been established, its detailed decomposition is poorly known. Dedicated experiments in the past few decades have measured the sum of the quark and anti-quark spins' contribution to account for only~25% of the proton's spin, whereas separating the sea-quark polarizations or constraining the gluon polarizations contribution is still a subject of active experimental research. The Relativistic Heavy Ion Collider (RHIC) is a unique facility that provides collisions between polarized protons and thereby excellent tools to study the gluons' role in the protons' spin. It also has capabilities of accessing avor asymmetric sea-quark polarization through W boson production. In this talk, recent results of the longitudinal spin program at PHENIX will be presented.