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<font color="#000099"><b><font color="#3333ff">Physics Seminar<br>
Wednesday, November 25, 2009<br>
11:00AM<br>
CEBAF Center AUD.<br>
Cookies & Coffee at 10:45AM</font></b><br>
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"Transverse Spin Structure of Neutron"
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Yi Qiang
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Duke University</b>
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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.
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Upcoming Seminars:
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Dec. 4 - Seamus Riordan (UVa)
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Dec. 15 - Heidi Schellman (Northwestern)<br>
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