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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Hello All,<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Please join us
<b>today</b> Friday, April 1<sup>st</sup><span class="apple-converted-space"> </span>at 1:00PM (EDT) for our next (virtual) theory seminar<span class="apple-converted-space"> </span>given by Joseph Karpie on:<span class="apple-converted-space"> </span><span style="background:white"><a href="https://jlab-org.zoomgov.com/j/1611179843?pwd=M09CNTFpbFVZSW1IQlhIMGp3RUVHUT09" target="_blank">https://jlab-org.zoomgov.com/j/1611179843?pwd=M09CNTFpbFVZSW1IQlhIMGp3RUVHUT09</a></span><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Please see below for the title and abstract of Joe's talk.<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><b><u><span style="font-size:12.0pt;color:black">Theory Seminar</span></u></b><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Friday,<span class="apple-converted-space"> </span><span style="background:#FF8080">April 1<sup>st</sup></span> at<span class="apple-converted-space"> </span><span style="background:#FF8080">1:00PM</span><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><b><u><span style="font-size:12.0pt;color:black">Joseph Karpie</span></u></b><span class="apple-converted-space"><i><span style="font-size:12.0pt;color:black"> </span></i></span><span style="font-size:12.0pt;color:black">(Columbia
University)<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">will discuss "<span style="background:white">Controlling systematic errors of parton distributions from the lattice</span>"<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><b><u><span style="font-size:12.0pt;color:black">Abstract:</span></u></b><span class="apple-converted-space"><span style="font-size:12.0pt;color:black"> </span></span><span style="font-size:12.0pt;color:black;background:white">The
description of hadrons in terms of their constituent particles, collectively called partons, has been a long sought goal of studying the Strong force. High energy experiments, such as those at Jefferson Lab, the Large Hadron Collider, and the future Electron
Ion Collider, have seek to probe the internal structure of nucleons and nuclei. Global analysis of these experiments have led to a phenomenological determination of various parton distributions. In the past decade, the calculation of parton distributions from
lattice QCD has developed significantly. The calculation of unpolarized quark distributions of the nucleon have matured to the point where systematic errors must be considered seriously for direct comparison to the phenomenological results. This need has also
grown even more serious as calculations of distributions less known to phenomenological analysis, such as polarized PDFs and GPDs, have begun in earnest. In the context of the pseudo-PDF method, I will discuss a general approach for modelling these systematic
errors and show how it has been applied to different observables. Finally, I will show the efficacy of combining lattice and experimental results both for improving the overall final PDF determination as well as constraining the systematic errors of the lattice
calculation.</span><span style="font-size:12.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Best Regards,<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Caroline, Colin & Patrick<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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