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A Prediction of the B*_c mass in full lattice QCD

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arxiv 0909.4462 v1 pith:M5JILOUC submitted 2009-09-24 hep-lat

E. B. Gregory , C. T. H. Davies , E. Follana , E. Gamiz , I. D. Kendall , G. P. Lepage , H. Na , J. Shigemitsu
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K. Y. Wong
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classification hep-lat
keywords latticemassfullhandlelightpredictionquarkquarks
verification ladder T0 review T1 audit T2 compute T3 formal
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By using the Highly Improved Staggered Quark formalism to handle charm, strange and light valence quarks in full lattice QCD, and NRQCD to handle bottom valence quarks we are able to determine accurately ratios of the B meson vector-pseudoscalar mass splittings, in particular, (m(B*_c)-m(B_c))/(m(B*_s)-m(B_s)). We find this ratio to be 1.15(15), showing the `light' quark mass dependence of this splitting to be very small. Hence we predict m(B_c*) = 6.330(7)(2)(6) GeV where the first two errors are from the lattice calculation and the third from existing experiment. This is the most accurate prediction of a gold-plated hadron mass from lattice QCD to date.

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Cited by 2 Pith papers

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  1. Observation of a $B_c^{*+}$ meson with the ATLAS detector

    hep-ex 2026-05 conditional novelty 8.0 of 10

    First observation of the B_c^{*+} meson with mass difference 64.5 MeV from the ground-state B_c^+ at >8 sigma significance using ATLAS data.

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    hep-ph 2026-07 conditional novelty 6.5 of 10

    MRS-pNRQCD plus GFMC stabilizes heavy-hadron spectroscopy; NNLO baryon masses undershoot lattice QCD by 125–175 MeV with 1/m_Q scaling, and a critical mass ratio for tetraquark binding is extracted.

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