<html><body><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; color: #000000"><div><p style="text-align: center; border: medium none; padding: 0in; margin: 0px;" data-mce-style="text-align: center; padding: 0in; margin: 0px;"><strong><span style="font-size: 48.0pt; line-height: 107%; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 48.0pt; line-height: 107%; font-family: 'Times New Roman',serif;">Physics Seminar</span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 20.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 20.0pt; font-family: 'Times New Roman',serif;"><br data-mce-bogus="1"></span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 20.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 20.0pt; font-family: 'Times New Roman',serif;">Jen-Chieh Peng</span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 20.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 20.0pt; font-family: 'Times New Roman',serif;"><br data-mce-bogus="1"></span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 20.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 20.0pt; font-family: 'Times New Roman',serif;">University of Illinois at Urbana-Champaign</span></strong></p><p style="margin: 0px;" data-mce-style="margin: 0px;"> </p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><em><span style="font-size: 18.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 18.0pt; font-family: 'Times New Roman',serif;">New Insight of the Drell-Yan Angular Distributions</span></em></p><p style="margin: 0px; line-height: normal;" data-mce-style="margin: 0px; line-height: normal;"><span style="font-size: 9.0pt; font-family: CMBX9;" data-mce-style="font-size: 9.0pt; font-family: CMBX9;"> </span></p><p style="margin: 0px; line-height: normal;" data-mce-style="margin: 0px; line-height: normal;"><span style="font-size: 9.0pt; font-family: CMBX9;" data-mce-style="font-size: 9.0pt; font-family: CMBX9;"> </span></p><p style="margin: 0px; text-align: center; line-height: normal;" data-mce-style="margin: 0px; text-align: center; line-height: normal;"><strong><span style="font-size: 18.0pt; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 18.0pt; font-family: 'Times New Roman',serif;">Abstract:</span></strong></p><p style="margin: 0px; text-align: center; line-height: normal;" data-mce-style="margin: 0px; text-align: center; line-height: normal;"><br> <br> <em><span style="font-size: 14.0pt;" data-mce-style="font-size: 14.0pt;">High precision data of dilepton angular distributions in Drell-Yan and<br> Z-boson production have revealed a large violation of the Lam-Tung relation.<br> Using an intuitive approach we show that the violation of the Lam-Tung<br> relation, as well as the kinematic dependencies of the angular distributions<br> coefficents, can be well understood. Implication of this work on other hard<br> processes and on the extraction of the Boer-Mulders function will also be<br> discussed</span></em>.<span style="font-size: 12.0pt;" data-mce-style="font-size: 12.0pt;"><br> <br> <br> </span></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 20.0pt; line-height: 107%; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 20.0pt; line-height: 107%; font-family: 'Times New Roman',serif;">Friday, April 20, 2018</span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 20.0pt; line-height: 107%; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 20.0pt; line-height: 107%; font-family: 'Times New Roman',serif;">11:00am</span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><strong><span style="font-size: 20.0pt; line-height: 107%; font-family: 'Times New Roman',serif;" data-mce-style="font-size: 20.0pt; line-height: 107%; font-family: 'Times New Roman',serif;">CEBAF Auditorium</span></strong></p><p style="text-align: center; margin: 0px;" data-mce-style="text-align: center; margin: 0px;"><br> <br></p><p style="margin: 0px;" data-mce-style="margin: 0px;">Upcoming Seminar Speakers<br> -------------------------<br> <span>April 27th</span>: Camillo Mariani<br> <span>June 1st</span>: Craig Roberts</p><p style="margin: 0px;" data-mce-style="margin: 0px;">July 24<sup>th</sup>: Crystal Bailey</p></div><div><br></div><div data-marker="__SIG_POST__">-- <br></div><div>Stephanie Tysor<br>Hall A Administrative Assistant<br>Thomas Jefferson National Accelerator Facility<br>(office)757-269-6005 (fax)757-269-5235</div></div></body></html>