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<p class="MsoNormal">Dear all,</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We will restart our seminar series <b>tomorrow</b>, Monday, August 30 at <b>9:00 AM</b>. Shuntaro Sakai will give a theory seminar on <a href="https://www.google.com/url?q=https://bluejeans.com/801786278/5878?src%3DcalendarLink&sa=D&source=calendar&usd=2&usg=AOvVaw25sgt91GOrFua-h6qKqY9J" target="_blank">https://bluejeans.com/801786278</a>,
see below for details.</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><u>Theory seminar</u></b><br>
Monday, August 30, <b>9:00 AM</b></p>
<p class="MsoNormal"><br>
<b>Shuntaro Sakai</b> (Osaka University) will talk about "Extraction of ND scattering lengths from the Lambda_b --> pi^- p D^0 decay and properties of the Sigma_c(2800)^+".</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><u>Abstract:</u></p>
<p class="MsoNormal">In this talk, we introduce our recent work on the analysis of the p D^0 invariant-mass distribution in the Lambda_b --> pi^- p D^0 decay to extract the S-wave ND scattering length with particular attention to the cusplike structure at the
n D^+ threshold.<br>
The analysis is based on a coupled-channel nonrelativistic effective field theory.<br>
It is found that the isovector ND scattering length is largely enhanced by the pole near the ND threshold which can be associated with Sigma_c(2800)^+.<br>
Our results suggest the spin and parity of this Sigma_c resonance is J^P=1/2^- which can couple to the S-wave ND channel.<br>
This talk is based on <a href="https://arxiv.org/abs/2004.09824" target="_blank">Phys. Lett. B 808 (2020) 135623</a> by Shuntaro Sakai, Feng-Kun Guo, and Bastian Kubis.</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The recordings and slides of our seminars can be found in the archives:</p>
<p class="MsoNormal"><a href="https://www.jlab.org/theory/seminars/2021seminars" target="_blank">https://www.jlab.org/theory/seminars/2021seminars</a></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Happy to be a part of the theory seminar organization!</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best,</p>
<p class="MsoNormal">Astrid, Colin and Patrick</p>
<p class="MsoNormal"><o:p> </o:p></p>
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