<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-7">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
Dear all, </div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<br>
On Monday, September 9<sup>th</sup>, 2024 at 1pm EDT, we will have a hybrid seminar given by Ramona Vogt of LLNL and UC Davis in CC F113 and on the Zoom for Government link: </div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<a href="https://jlab-org.zoomgov.com/j/1603917110?pwd=Bycf6MrWwsZB1MdhYpy8ihG06RnqpD.1" target="_blank" id="OWA2d99a206-7ece-4ac4-1797-5e7a3733d13e" class="OWAAutoLink" rel="noopener noreferrer" data-auth="NotApplicable" data-linkindex="0" style="margin: 0px; text-align: left;">https://jlab-org.zoomgov.com/j/1603917110?pwd=Bycf6MrWwsZB1MdhYpy8ihG06RnqpD.1</a></div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
Please see below for the title and abstract. </div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<b><u>Theory Seminar</u></b>:<b> </b>September 9<sup>th</sup>, 1pm EDT (hybrid) </div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<b><u><br>
</u></b></div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<b><u>Speaker</u></b>: Ramona Vogt (LLNL and UC Davis) </div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<b><u><br>
</u></b></div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<b><u>Title</u></b>:<b> </b>Status of Intrinsic Charm </div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<b><u><br>
</u></b></div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<b><u>Abstract</u></b>: A nonperturbative charm production contribution, known as intrinsic charm, has been speculated since the 1980s. While it has yet to be satisfactorily proven, there have been recent tantalizing hints. Several experiments, either taking
data or planned, could provide definitive evidence in the next few years. Recent experiments that have taken J/ø and D meson data include SeaQuest at Fermilab and SMOG at LHCb. Future experiments such as NA60+ are in an energy regime where the intrinsic charm
quark signa-ture could be large and unmistakable. In this talk, the status of intrinsic charm is reviewed and model comparisons are made to available data. Production of tetraquarks by intrinsic charm is also discussed. See Refs. [1-4].</div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
[1] R. Vogt, Limits on Intrinsic Charm Production from the SeaQuest Experiment, Phys. Rev. C 103 (2021), 035204.<br>
[2] R. Vogt, Contribution from Intrinsic Charm Production to Fixed-Target Interactions with the SMOG Device at LHCb, Phys. Rev. C 108 (2023) 015201.<br>
[3] R. Vogt, Energy dependence of intrinsic charm production: Determining the best energy for observation, Phys. Rev. C 106 (2022) 025201.</div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
[4] R. Vogt, Tetraquark Production by Intrinsic Charm, arXiv:2405.09018.</div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<br>
This work was performed under the auspices of the U.S.\ DoE by LLNL under Contract DE-AC52-07NA27344 and supported by LDRD projects 21-LW-034 and 23-LW-036. </div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
See you on Monday. </div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
Best regards, </div>
<div style="text-align: left; text-indent: 0px; margin: 0px; font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
Caroline, Joe, Zheng-Yang, and Gloria</div>
</body>
</html>