B_c spectroscopy using highly improved staggered quarks

2018/11/23 by Lytle, Andrew, Colquhoun, Brian, Davies, Christine +1
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat)

paper · doi:10.48550/arxiv.1811.09448

Abstract

We report on a calculation of B_c ground state and radial excitation energies, obtained from heavy-charm highly improved staggered quark (HISQ) correlators computed on MILC gauge ensembles, with lattice spacings down to a=0.044 fm. Using HISQ valence quarks on progressively finer lattices allows us to simulate up to the b-quark mass. In particular we focus on the B_c(2S) energy, which we compare with O(α_s)-improved non-relativistic QCD results computed on the same ensembles and recent experimental results from ATLAS.

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