Bottom hadron mass splittings in the static limit from 2+1 flavour lattice QCD

Abstract

Dynamical 2+1 flavour lattice QCD is used to calculate the splittings between the masses of mesons and baryons containing a single static heavy quark and domain-wall light and strange quarks. Our calculations are based on the dynamical domain-wall gauge field configurations generated by the RBC and UKQCD collaborations at a spatial volume of (2.7 fm)^3 and a range of quark masses with a lightest value corresponding to a (partially-quenched) pion mass of 275 MeV. When extrapolated to the physical values of the light quark masses, the results of our calculations are generally in good agreement with experimental determinations in the bottom sector. However, the static limit splittings between the Omega_b^- baryon and other bottom hadrons tend to slightly underestimate those obtained using the recent D-zero measurement of the Omega_b^-.

14 pages, 3 figures

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Cited by in corpus (9)

• Charmed bottom baryon spectroscopy from lattice QCD
• SU(3) mass-splittings of heavy-baryons in QCD
• Lattice QCD study of mixed systems of pions and kaons
• Prediction of the Omega_bbb mass from lattice QCD
• Signal/noise enhancement strategies for stochastically estimated correlation functions
• The static-light baryon spectrum from twisted mass lattice QCD
• Heavy-Baryon Spectroscopy from Lattice QCD
• Bottom-Hadron Mass Splittings from Static-Quark Action on 2+1-Flavor Lattices
• The spectrum of static-light baryons in twisted mass lattice QCD