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<tt><b><strong><font color="#3333ff">Theory Center Seminar<br>
Wed., Feb. 6, 2013<br>
11:00 a.m.-12:15 p.m. <br>
(coffee at 10:45 a.m.)<br>
CEBAF Center, Room L102</font></strong><br>
<br>
</b><br>
<b> <font color="#ff0000">Ted Rogers<br>
Stony Brook University </font></b></tt><b><font
color="#ff0000"> </font></b><tt><br>
<br>
<b>Exploring Hadron Structure with Transverse Momentum<br>
Dependent (TMD) Factorization </b></tt> <tt><br>
<br>
Perturbative QCD will play an essential role in current and
planned studies of the quark</tt> <tt><br>
and gluon structure of hadrons. However, for inclusive processes
that are sensitive to<br>
intrinsic bound state transverse momentum, the usual collinear
factorization approach <br>
must be replaced by a transverse momentum dependent (TMD)
factorization formalism.<br>
In order to extract information about hadron structure from
experimental data, it will be <br>
crucial to develop implementations of TMD-factorization analogous
to those that already<br>
exist for collinear factorization. In my talk, I will review
recent theoretical developments in <br>
TMD-factorization and discuss the complementary goals of obtaining
knowledge about <br>
hadron structure and of experimentally testing small-coupling
perturbative QCD methods. <br>
Next, I will describe my current project of combining large and
diverse data sets, from <br>
experiments for a wide variety of different processes, into fits
that constrain the non-<br>
perturbative input needed for implementations of
TMD-factorization. The methodology <br>
permits universal functions to be isolated and identified in a way
that is consistent with <br>
a complete MD-factorization treatment. I will end by presenting an
overview of recent work<br>
I have done on the identification of novel phenomenological
consequences of the breakdown<br>
in TMD-factorization expected for certain classes of processes.
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