<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><pre style="word-wrap: break-word; white-space: pre-wrap;" class=""><span style="font-size: 14px;" class=""><span style="font-family: Helvetica; white-space: normal;" class="">Theory Seminar</span><br style="font-family: Helvetica; white-space: normal;" class=""><span style="font-family: Helvetica; white-space: normal;" class="">Wednesday, January 17</span><br style="font-family: Helvetica; white-space: normal;" class=""><span style="font-family: Helvetica; white-space: normal;" class="">2:00pm - CEBAF Center, Room L102</span></span></pre><pre style="word-wrap: break-word;" class=""><font face="Helvetica" class=""><span style="font-size: 14px; white-space: normal;" class="">Thomas Mehen (Duke U.) : Quarkonium production in jets</span></font></pre><pre style="word-wrap: break-word;" class=""><span style="white-space: pre-wrap; font-size: 14px;" class=""><span style="font-family: Helvetica; white-space: normal;" class="">--------------------------------------------------------</span><br style="font-family: Helvetica; white-space: normal;" class="">Bluejeans room: the link to connect is available at </span><span style="font-size: 14px; white-space: pre-wrap;" class=""><a href="https://www.jlab.org/div_dept/theory/seminars/2018-spring-theory-seminar.html" class="">https://www.jlab.org/div_dept/theory/seminars/2018-spring-theory-seminar.html</a></span></pre><pre style="word-wrap: break-word; white-space: pre-wrap;" class=""><span style="font-size: 14px;" class="">Abstract:</span></pre><pre style="word-wrap: break-word; white-space: pre-wrap;" class=""><span style="font-size: 14px;" class="">This talk will describe new tests of quarkonium production using quarkonia that are produced within jets. We study the distribution in the fraction
z of a jet's longitudinal momentum carried by the quarkonium. The z distribution is sensitive to the underlying NRQCD production mechanism.
Analytic calculations the z distributions in SCET that incorporate Next-to-Leading-Log (NLL) resummation disagree with default PYTHIA predictions.
We describe a modified simulation method which agrees well with NLL analytic calculations. This method is then successfully applied to recent
LHCb measurements of J/psi within jets. We discuss the implications of this measurement for extractions of NRQCD long-distance matrix elements.
Finally, we discuss other observables involving quarkonium within jets which may be useful for discriminating between NRQCD production mechanisms.</span></pre><div class=""><br class=""></div><div class="">
<div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><pre class="moz-signature" cols="72" style="background-color: rgb(255, 255, 255);">--
Postdoctoral researcher
Theory Center - Jefferson Lab
12000 Jefferson Avenue,
Newport News, VA 23606 USA
CEBAF center, office A211
<span style="white-space: normal;" class="">Tel: +1 (757) 269-6735</span></pre><pre class="moz-signature" cols="72" style="background-color: rgb(255, 255, 255);"><br class=""></pre><pre class="moz-signature" cols="72" style="background-color: rgb(255, 255, 255);"><br class=""></pre></div></div></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">
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