Speaker
Dr
Luka Leskovec
(University of Arizona)
Description
We present a lattice QCD study of the $\rho$ resonance with $N_f=2+1$ clover fermions at a pion mass of approximately 320 MeV and lattice size 3.6 fm. We study two processes involving the $\rho$. The first process is scattering of two pions in P-wave with isospin 1 where by using the Luescher method we determine the strong scattering phase shift, from which we determine the $\rho$ resonance mass and decay width $\Gamma(\rho \to \pi\pi)$. The second process is the radiative transition $\pi\gamma \to \pi\pi$ where we follow the Briceno-Hansen-Walker-Loud approach to determine the radiative transition amplitude in the invariant mass region near the $\rho$ resonance and both space- and time-like momentum transfer. This allows us to determine the coupling between the $\rho$, the pion and the photon and the $\rho$ radiative decay width.
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Primary author
Dr
Luka Leskovec
(University of Arizona)
Co-authors
Dr
Andrew Pochinsky
(MIT)
Prof.
Constantia Alexandrou
(cComputation-based Science and Technology Research Center, The Cyprus Institute)
Mr
Gumaro Rendon
(University of Arizona)
Prof.
John W. Negele
(MIT)
Dr
Marcus Petschlies
(HISKP, Bonn)
Prof.
Sergey Syritsyn
(SUNY, Stony Brook)
Mr
Srijit Paul
(Computation-based Science and Technology Research Center, The Cyprus Institute)
Prof.
Stefan Meinel
(University of Arizona)
