<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255)">Hello All,</span>
<div style="font-size:12pt;margin:0px;background-color:rgb(255, 255, 255)">
<div style="margin:0px"><br>
</div>
<div style="margin:0px">Tomorrow at 1:00 PM (EDT), Peter Risse will give our<span> </span><span style="margin:0px;background-color:rgb(255, 255, 0)">first hybrid theory</span><span> </span>seminar of the Fall term.</div>
<div style="margin:0px">If you will be on-site and are comfortable doing so, please join us in room F224/225 of CEBAF Center. Otherwise, Peter's seminar will also be provided virtually on our usual ZoomGov link:<span> </span><a href="https://jlab-org.zoomgov.com/j/1611179843?pwd=M09CNTFpbFVZSW1IQlhIMGp3RUVHUT09" target="_blank" rel="noopener noreferrer" data-auth="NotApplicable" data-linkindex="0" style="margin:0px">https://jlab-org.zoomgov.com/j/1611179843?pwd=M09CNTFpbFVZSW1IQlhIMGp3RUVHUT09</a><br>
</div>
<br>
<div style="margin:0px">Please see below for the title and abstract of Peter's talk.</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px"><u><b>Theory Seminar</b></u></div>
<div style="margin:0px">Monday, September 19th at 1:00 PM</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px"><u><b>Peter Risse</b></u><span> </span>(University of M<font face="Liberation Serif, serif">ü</font>nster)</div>
<div style="margin:0px">will discuss "Towards a Markov Chain Monte Carlo investigation of nuclear PDFs"</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px"><u><b>Abstract:</b></u><span> </span>Nuclear parton distribution functions (nPDFs) describe the</div>
<div style="margin:0px">structure of nuclei as composed of quarks and gluons. They are a key</div>
<div style="margin:0px">element in making predictions for collider experiments. Due to their</div>
<div style="margin:0px">non-perturbative nature, the extraction of nPDFs relies on a global</div>
<div style="margin:0px">analysis of multiple hard scattering processes, such as deep inelastic</div>
<div style="margin:0px">scattering (DIS), Drell-Yan (DY), lepton pair production and inclusive</div>
<div style="margin:0px">jet production. In this talk, we investigate the use of Markov Chain</div>
<div style="margin:0px">Monte Carlo methods as an alternative fitting procedure in order to</div>
<div style="margin:0px">infer the nPDFs from the available experimental data. Monte Carlo</div>
<div style="margin:0px">simulations are computationally costly. Therefore we have to optimize</div>
<div style="margin:0px">the evaluation speed of physical observables. Especially the prediction</div>
<div style="margin:0px">in the DIS sector has to be improved, since it makes up the bulk of the</div>
<div style="margin:0px">experimental data. Here we will focus on the treatment of heavy quark</div>
<div style="margin:0px">effects in the predictions.</div>
<div style="margin:0px"><br>
</div>
<div style="margin:0px">See you tomorrow!</div>
Caroline, Colin & Patrick</div>
<br>
</div>
</body>
</html>