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<font color="#000099"><b><font color="#3333ff">Physics Seminar<br>
Friday, November 20, 2009<br>
11:00AM<br>
CEBAF Center AUD.<br>
Cookies & Coffee at 10:45AM</font></b><br>
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<b><font color="#990000">Jacques Soffer
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Temple University
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"Fundamental Open Questions in Spin Physics"
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There is a long list of open questions and to answer, but a simple one
is "What is particle spin good for?". I will start by giving a few
examples of unexpected intringing observations. Many questions refer
to the nucleon spin puzzle, for example, its quark flavor decomposition
or the gluon contribution and the orbital angular momentum contribution
to the nucleon spin. One must also ask how important is the quark
transversity? I will discuss the effects of non-zero intrinsic
transverse momentum, which remain to be clarified in connection with
the interpretation of large single transverse spin asymmetries.
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Upcoming Seminars:
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Nov. 25 - Yi Qiang (Duke)
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Dec. 4 - Seamus Riordan (UVa)
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Dec. 15 - Heidi Schellman (Northwestern)<br>
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