Spectroscopy of Light and Charmed Baryons using Overlap Fermions
We present preliminary results on the positive and negative parity light and charmed baryon spectra using overlap valence quarks on MILC's 2+1+1 flavour HISQ gauge configurations. These calculations are performed on three different gauge ensembles at lattice spacings (a=0.12 fm, 0.09 fm and 0.06 fm) and for physical strange and charm quark masses. For the coarse lattice we use lightest pion mass as small as physical pion mass and for the finer lattices we use lightest pion masses around 340-400 MeV. The SU(2) heavy baryon chiral perturbation theory is used to extrapolate these results to the physical pion mass and the continuum limit extrapolations are also performed. Our results are consistent with the experimental values of the well measured charmed baryons. We predict yet to be discovered doubly charmed octet and decuplet baryons.
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Hadron Spectroscopy and Interactions