A New Determination of M_b Using Lattice QCD

Details A New Determination of M_b Using Lattice QCD A New Determination of M_b Using Lattice QCD

1994-04-21

arxiv.org/abs/hep-lat/9404012v2

Phys.Rev.Lett. 73 (1994) 2654-2657

Physics

High Energy Physics

High Energy Physics - Lattice

10 pages, latex, SCRI-94-39, OHSTPY-HEP-T-94-004

Scientific paper

10.1103/PhysRevLett.73.2654

Recent results from lattice QCD simulations provide a realistic picture, based upon first principles, of~$\Upsilon$ physics. We combine these results with the experimentally measured mass of the $\Upsilon$~meson to obtain an accurate and reliable value for the $b$-quark's pole mass. We use two different methods, each of which yields a mass consistent with $M_b = 5.0(2)$~GeV. This corresponds to a bare mass of $M_b^0 = 4.0(1)$~GeV in our lattice theory and an $\msbar$~mass of $M_b^\msbar(M_b)=4.0(1)$~GeV. We discuss the implications of this result for the $c$-quark mass. ******************************************************************************* THIS IS THE VERSION WHICH WILL BE PUBLISHED IN PRL. SUBSTANTIAL MATERIAL HAS BEEN ADDED, INCLUDING RESULTS WITH DYNAMICAL FERMIONS AND A CALCULATION OF THE MSBAR MASS. *******************************************************************************

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