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<b><span style="font-size:48.0pt">Physics Seminar<o:p></o:p></span></b></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span class="value"><b><span style="font-size:22.0pt">Carlos Ayerbe Gayoso<o:p></o:p></span></b></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span class="value"><span style="font-size:22.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span class="value"><b><span style="font-size:22.0pt">William and Mary</span></b></span><o:p></o:p></p>
<p class="MsoNormal"><b><i><o:p> </o:p></i></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><i><span style="font-size:22.0pt">Clouds Over the Nucleon, a Glimpse Into the Mesonic Content of the Nucleon Through Tagged Deep Inelastic Scattering<o:p></o:p></span></i></p>
<p class="MsoNormal" align="center" style="text-align:center"><i><span style="font-size:22.0pt"><o:p> </o:p></span></i></p>
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<b><span style="font-size:18.0pt">Abstract:</span></b><span style="font-size:17.0pt;font-family:CMR17"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:17.0pt;font-family:CMR17"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">The internal structure of the Nucleon has been studied for more than 60 years providing a very good understanding of its dynamics. On the other
hand, the internal structure of the pion, which is in principle the simplest QCD bound state, is less explored, and its Parton distribution functions less known. Nevertheless, the presence of a virtual meson-cloud surrounding the Nucleon has been successful
to explain the deviation of the Gottfried sum rule and implying the possibility of using the cloud as a virtual target, thus accessing pion structure through the Sullivan process (electron scattering off the nucleon meson cloud). Making use of the tagging
technique (measuring one or more of the recoil nucleons in coincidence with the scatter electron) allows to isolate the Sullivan process from competing reactions.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">In this talk, I will present the motivation for a pioneering experiment in JLab's Hall A to measure the tagged pion structure function, details
of the experiment and of the new detectors, projected results and further steps in the tagged structure functions project.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:CMR10"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><o:p> </o:p></i></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt">Thursday January 19, 2019<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt">11:00 am<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt">CEBAF Center L102<o:p></o:p></span></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Stephanie Tysor<o:p></o:p></p>
<p class="MsoNormal">Thomas Jefferson National Accelerator Facility<o:p></o:p></p>
<p class="MsoNormal">Physics Division<o:p></o:p></p>
<p class="MsoNormal">Hall A & C Administrative Assistant<br>
(office)<a href="callto:757-269-6005"><span style="color:blue">757-269-6005</span></a> (fax)<a href="callto:757-269-5235"><span style="color:blue">757-269-5235</span></a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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