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<td>Physics Seminar Thursday, 3 April 12:45 pm Small 122</td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">Date: </th>
<td>Mon, 31 Mar 2014 14:17:19 +0000</td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">From: </th>
<td>Wilkinson, Eleonor V <a class="moz-txt-link-rfc2396E" href="mailto:evwilk@wm.edu"><evwilk@wm.edu></a></td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">To: </th>
<td>'<a class="moz-txt-link-abbreviated" href="mailto:physics0607@physics.wm.edu">physics0607@physics.wm.edu</a>'
<a class="moz-txt-link-rfc2396E" href="mailto:physics0607@physics.wm.edu"><physics0607@physics.wm.edu></a></td>
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<th nowrap="nowrap" valign="BASELINE" align="RIGHT">CC: </th>
<td>'<a class="moz-txt-link-abbreviated" href="mailto:mfox@jlab.org">mfox@jlab.org</a>' <a class="moz-txt-link-rfc2396E" href="mailto:mfox@jlab.org"><mfox@jlab.org></a></td>
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<p class="MsoPlainText"><b>PHYSICS SEMINAR<o:p></o:p></b></p>
<p class="MsoPlainText">Thursday, April 3, 2014<o:p></o:p></p>
<p class="MsoPlainText">12:40 PM <o:p></o:p></p>
<p class="MsoPlainText">Small Hall, Room 122<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><b>Peter Stoffer </b>[Host: André
Walker-Loud] <o:p></o:p></p>
<p class="MsoPlainText">Bern University, Switzerland<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Title of Talk:<o:p></o:p></p>
<p class="MsoPlainText"><b><i>“Dispersive Approach to Hadronic
Light-by-Light Scattering and the Muon g-2”<o:p></o:p></i></b></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><b>Abstract:<o:p></o:p></b></p>
<p class="MsoPlainText">The anomalous magnetic moment of the
muon has been measured and computed to very high precision of
about 0.5 ppm. For more than a decade, a discrepancy has
persisted between the experiment and the Standard Model
prediction, now of about 3.5 sigma. Forthcoming experiments at
FNAL and J-PARC aim at reducing the experimental error by a
factor of 4.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">The main uncertainty of the theory
prediction is due to strong interaction effects. At present,
the largest uncertainty comes from hadronic vacuum
polarisation, which, however, is expected to be reduced
significantly with help of new data from e+e- experiments. In
a few years, the subleading hadronic light-by-light (HLbL)
contribution will become the dominating error.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">So far, only model calculations of the
HLbL contribution exist. Recently, we have published a first
model-independent, dispersive approach to HLbL scattering (see
arXiv:1402.7081). I will explain the ideas of our approach and
highlight the advantages of a data-driven determination of the
hadronic light-by-light contribution.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Everyone is invited to attend.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">******<o:p></o:p></p>
<p class="MsoPlainText">Eleonor V. Wilkinson<o:p></o:p></p>
<p class="MsoPlainText">Administrative Coordinator<o:p></o:p></p>
<p class="MsoPlainText">The College of William &
Mary-Physics<o:p></o:p></p>
<p class="MsoPlainText">Small Hall, Room 123<o:p></o:p></p>
<p class="MsoPlainText">300 Ukrop Way<o:p></o:p></p>
<p class="MsoPlainText">Williamsburg, VA 23185<o:p></o:p></p>
<p class="MsoPlainText">Telephone: 757-221-3503<o:p></o:p></p>
<p class="MsoPlainText">Fax: 757-221-3540<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
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