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<b><span style="font-size:48.0pt;font-family:"Times New Roman",serif">Physics Seminar<span class="value"><o:p></o:p></span></span></b></p>
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<p class="MsoNormal" align="center" style="text-align:center"><span class="value"><b><span style="font-size:26.0pt;font-family:"Times New Roman",serif">Holly Szumila-Vance</span></b></span><span style="font-size:26.0pt"><o:p></o:p></span></p>
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<b><i><span style="font-size:20.0pt;font-family:"Times New Roman",serif">Searching for the Onset of Color Transparency in A(e,e’p) in Hall C at Jefferson Lab<o:p></o:p></span></i></b></p>
<p class="MsoNormal"><b><span style="font-size:20.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:20.0pt;font-family:"Times New Roman",serif">Abstract:<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:20.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span style="color:black">Color transparency (CT) is a fundamental phenomenon
</span><span style="font-family:"Times New Roman",serif;color:black">of QCD postulating that at high momentum transfer, one can preferentially measure hadrons that fluctuate to a small color neutral transverse size in the nucleus, and final state interactions
within the nuclear medium are suppressed. CT is observed experimentally as a rise in the measured nuclear transparency as a function of the momentum transferred. While CT has been observed for mesons, it remains unconfirmed in baryons. Observation of CT in
baryons would provide a new means to study the nuclear strong force and would be the first clear observation of hadrons fluctuating to a small size in the nucleus. An enhancement in the nuclear transparency was observed in A(p,2p) reactions at Brookhaven.
</span><span style="font-family:"Times New Roman",serif">This experiment, E1206107, seeks to confirm the measurement of pro</span><span style="font-family:"Times New Roman",serif;color:black">ton transparency as well as to measure the onset. During the spring
of 2018, this experiment was the first to run in Hall C at Jefferson Lab using the recently upgraded 12 GeV electron beam and obtained four kinematic points at momentum transfer Q^2 from 8-14.3 GeV^2, overlapping the same region where Brookhaven previously
observed an enhancement. This experiment used the High Momentum Spectrometer (HMS) and Super High Momentum Spectrometer (SHMS) in coincidence to measure A(e,e'p) on a carbon target. This talk will summarize the motivation to measure the onset of color transparency
in baryons and will present preliminary results from this experiment.</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:black">DOE Grant Number: DE-FG02-07ER41528</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt;font-family:"Times New Roman",serif">Monday, November 25, 2019<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt;font-family:"Times New Roman",serif">9:00am<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt;font-family:"Times New Roman",serif">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 & 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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