<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="">Dear DPWG members,<div class=""><br class=""></div><div class="">Please review the following abstract and send Nathan comments. This work was recently presented at the DPWG meeting. We will assume that all the plots will be labeled PRELIMINARY.</div><div class=""><br class=""></div><div class="">Thanks,</div><div class="">Keith</div><div class="">DPWG<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">Begin forwarded message:</div><br class="Apple-interchange-newline"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">From: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">Nathan Harrison <<a href="mailto:harrison@phys.uconn.edu" class="">harrison@phys.uconn.edu</a>><br class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">Subject: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class=""><b class="">Abstract for Santa Fe APS/DNP Meeting</b><br class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">Date: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">June 30, 2015 at 10:56:01 AM EDT<br class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">To: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">Keith Griffioen <<a href="mailto:griff@jlab.org" class="">griff@jlab.org</a>><br class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">Cc: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">Kyungseon Joo <<a href="mailto:kjoo@phys.uconn.edu" class="">kjoo@phys.uconn.edu</a>><br class=""></span></div><br class=""><div class=""><div dir="ltr" class="">Dear Keith,<div class=""><br class=""></div><div class="">I would like to submit an abstract for the APS/DNP meeting in Santa Fe. Could you distribute this draft to the DPWG to see if there are any comments?</div><div class=""><br class=""></div><div class="">Measurements of the cos\phi and cos2\phi moments of the semi-inclusive deep inelastic scattering (SIDIS) cross-section were performed. The data set used was the E1-f run from the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab which ran in 2003. The run used a 5.498 GeV longitudinally polarized electron beam and an unpolarized liquid hydrogen target. Two pion channels (\pi+ and \pi-) were studied over a broad kinematical range (x = 0.1 - 0.6, Q^2 = 1.0 - 4.5 GeV^2, z = 0.0 - 1.0, and P_T = 0.0 - 1.0 GeV). These measurements give insights into the transverse momentum dependence of parton distribution functions (PDFs) which describe the dynamics of quarks and gluons inside of the proton. This may give access to the quark orbital angular momentum contribution to the proton spin.<br class=""></div><div class=""><br class=""></div><div class="">Thanks.</div><div class=""><br class=""></div><div class="">Best Regards,</div><div class="">Nathan</div></div>
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