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Theory Center Seminar<br>
Monday, March 29, 2010<br>
1:00 p.m.<br>
CEBAF Center, Room L104<br>
Coffee at 12:45 p.m.<br>
<br>
<b>The X(3872) Files
</b><br>
<br>
Eric Braaten<br>
Ohio State University
<br>
<br>
Many new c c-bar mesons have been discovered in recent years that lie
<br>
above the charm meson pair threshold and have properties that seem
<br>
incompatible with charmonium. There is one whose structure can be
<br>
deduced unambiguously from the current data: the amazing X(3872).
<br>
I will explain what the X(3872) is, but that will not answer the
question
<br>
of why it is. I will offer some suggestions for how effective field
<br>
theory methods might help answer that question.
<br>
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