<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Dear All, <div class=""><br class=""></div><div class="">Here is a reminder of the cake seminar today:</div><div class=""><br class=""></div><div class="">Cake Seminar:<br class="">Wednesday, December 5th, 1:00PM, Room L102,<br class="">Luka Leskovec (Jlab), "A lattice QCD study of the $\rho$ meson"<br class="">BlueJeans link: <a href="https://bluejeans.com/195615763" class="">https://bluejeans.com/195615763</a><br class=""><br class="">Abstract: <br class="">The $\rho$, perhaps the simplest hadronic resonance, offers plenty of interesting phenomena where new methods in lattice field theory can be tested and better understood. In this talk I will present results from our recent lattice QCD studies with $N_f=2+1$ clover fermions at a pion mass of approximately 320 MeV and lattice size 3.6 fm. I will discuss two processes involving the $\rho$: the first is by now the already well studied elastic scattering of two pions in P-wave with isospin 1, where the $\rho$ appears as a resonance. By analyzing the spectrum with the Luescher method we determine the strong decay width $\rho$→ $\pi\pi$. The second process is the radiative transition $\pi \gamma$ → $\pi\pi$ where we use the Briceno-Hansen-Walker-Loud approach to determine the transition amplitude in the invariant mass region near the $\rho$ resonance for both space- and time-like photon momentum. By analytic continuation to the $\rho$ pole we are able to determine also the $\rho$ radiative decay width, $\rho$→ $\pi\gamma$.</div><div class=""><br class=""></div><div class="">Thank you.<br class=""><br class="">Carlota, Vincent & Raza</div></body></html>