[Jlab-seminars] Physics Seminar Announcement

[Luci Collins]

*Physics Seminar
Wednesday, November 25, 2009
11:00AM
CEBAF Center AUD.
Cookies & Coffee at 10:45AM*

*
"Transverse Spin Structure of Neutron"

Yi Qiang
Duke University*

Transversity is a quark's transverse polarization in a transversely 
polarized nucleon.  From a realistic 3-D point of view, out of three 
leading order quark distributions, transversity is the least known. At 
Jefferson Lab Hall A, we recently finished the first measurement of the 
neutron target single spin asymmetry in semi-inclusive deep inelastic 
scattering with a transversely polarized 3He target.  The goal is to 
extract neutron transversity which gives an unique azimuthal angular 
dependence when convoluted with Collins fragmentation function in such a 
SIDIS reaction.  Other two leading twist transverse momentum 
distribution functions, Sivers function and pretzelosity, will be 
extracted as well.  The data from this experiment, when combined with 
world data collected on proton, deuteron SIDIS and e+e- annihilation, 
will provide constraints on the transversity and Sivers distributions on 
both u-quark and d- quark in the valence region.


Upcoming Seminars:

Dec. 4  - Seamus Riordan (UVa)
Dec. 15 - Heidi Schellman (Northwestern)


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