Speaker
Srijit Paul
(University of Maryland)
Description
We present results for the $N\pi$ finite-volume spectra on three different lattice volumes with fixed lattice spacing $a=0.116$ fm and $m_\pi$ ranging from $249$ MeV to $137$ MeV. The calculations employ $N_f=2+1$ doubly-HEX-smeared clover fermions. We perform the calculations with total momenta up to $\vec{P}=(1,1,1)\frac{2\pi}{L}$ and all relevant irreps. Using the L\"uscher method we fit Breit-Wigner parametrizations of the $N\pi$ scattering amplitude to the spectra to obtain the mass and decay width of the lightest baryon resonance, the $\Delta(1232)$.
Author
Srijit Paul
(University of Maryland)
Co-authors
Dr
Andrew Pochinsky
(MIT)
Ferenc Pittler
(The Cyprus Institute)
Prof.
John W Negele
(MIT)
Luka Leskovec
(University of Ljubljana)
Marcus Petschlies
(U. Bonn)
Sergey Syritsyn
(Stony Brook University)
Stefan Krieg
(JSC, Forschungszentrum Juelich/HISKP, University of Bonn)
Stefan Meinel
(University of Arizona / RIKEN BNL Research Center)
