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<pre>Theory Center Seminar
Monday, Oct. 5, 2009
1:00 p.m.
CEBAF Center, Room L104</pre>
<pre wrap="">Jian Zhou
Lawrence Berkeley National Lab</pre>
<pre><span class="moz-txt-tag"></span><b>TMDs and Polarized Drell-Yan Process</b></pre>
<pre wrap=""><b class="moz-txt-star"><span class="moz-txt-tag"></span></b>In this talk, I will discuss the spin-dependent quark distributions at
large transverse momentum. We derive their transverse momentum dependent
behaviors in the collinear factorization approach. We further calculate
the angular distribution of the Drell-Yan lepton pair production with
polarized beams and present the results in terms of the collinear
twist-3 correlation functions. In the intermediate transverse momentum
region, our explicit calculations have shown that the collinear
factorization and the transverse momentum dependent factorization
approaches are consistent in the description of the lepton pair angular
distributions.
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