Heavy-light Mesons and Baryons with b quarks

Details Heavy-light Mesons and Baryons with b quarks Heavy-light Mesons and Baryons with b quarks

1999-12-19

arxiv.org/abs/hep-lat/9912034v2

Phys.Rev.D62:054505,2000

Physics

High Energy Physics

High Energy Physics - Lattice

34 pages, LaTeX, 13 postscript figures, version as publish in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.62.054505

We present lattice results for the spectrum of mesons containing one heavy quark and of baryons containing one or two heavy quarks. The calculation is done in the quenched approximation using the NRQCD formalism for the heavy quark. We analyze the dependence of the mass splittings on both the heavy and the light quark masses. Meson P-state fine structure and baryon hyperfine splittings are resolved for the first time. We fix the b quark mass using both M_B and M_{\Lambda_b}, and our best estimate is m_b^\MSbar(m_b^\MSbar) = 4.35(10)({}^{-3}_{+2})(10) GeV. The spectrum, obtained by interpolation to m_b, is compared with the experimental data.

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