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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">Scott Barcus</span></b></span><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"><o:p> </o:p></span></b></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span class="value"><b><span style="font-size:22.0pt">The College of William & Mary</span></b></span><o:p></o:p></p>
<p class="MsoNormal"><b><i><span style="font-size:12.0pt"><o:p> </o:p></span></i></b></p>
<p class="p1" align="center" style="text-align:center"><i><span style="font-size:22.0pt;font-family:"Times New Roman",serif">Extraction and Parametrization of Isobaric Tri-nucleon Elastic Cross Sections and Form Factors<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:22.0pt"><o:p> </o:p></span></i></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt">Abstract:<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt"><o:p> </o:p></span></b></p>
<p class="p1"><span style="font-size:14.0pt;font-family:"Times New Roman",serif">By mining data from Jefferson Lab Hall A experiment E08-014 a new measurement of the 3He elastic cross section at Q<sup>2</sup> = 34 fm<sup>-2</sup> was extracted. This new data
point falls approximately halfway between the first and second diffractive minima of the 3He form factors. Along with recent high Q<sup>2</sup> elastic cross section measurements from JLab, this new point improves our knowledge of the cross section at large
momentum transfers. The new high Q<sup>2</sup> data motivate a re-analysis of the
<sup>3</sup>He elastic cross section world data and promise an improved understanding of the magnetic form factor in particular. This presentation will discuss the new cross section measurement as well as modern sum of Gaussians fits to the updated
<sup>3</sup>He world data in addition to its mirror nuclei <sup>3</sup>H. Updated charge and magnetic form factors from these fits will be discussed as well as charge radii. The results will be contrasted with previous t results and current theoretical predictions.<o:p></o:p></span></p>
<p class="p1"><span style="font-size:14.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><o:p> </o:p></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt">Tuesday, February 5, 2019<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt">2:00pm<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 F113<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 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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