[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 1/2?. 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.


** **


-- 
Linda Ceraul
Physics Administrative Assistant
Jefferson Lab

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