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arXiv · 1010.3848

Precise B, B_s and B_c meson spectroscopy from full lattice QCD

Eric B. Gregory·Christine T. H. Davies·Iain D. Kendall·Jonna Koponen·Kit Wong·Eduardo Follana·Elvira Gamiz·G. Peter Lepage·Eike H. Muller·Heechang Na·Junko Shigemitsu
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Abstract

We give the first accurate results for $B$ and $B_s$ meson masses from lattice QCD including the effect of $u$, $d$ and $s$ sea quarks, and we improve an earlier value for the $B_c$ meson mass. By using the Highly Improved Staggered Quark action for $u/d$, $s$ and $c$ quarks and NRQCD for the $b$ quarks, we are able to achieve an accuracy in the masses of around 10 MeV. Our results are: $m_B$ = 5.291(18) GeV, $m_{B_s}$ = 5.363(11) GeV and $m_{B_c}$ = 6.280(10) GeV. Note that all QCD parameters here are tuned from other calculations, so these are parameter free tests of QCD against experiment. We also give scalar, $B_{s0}^*$, and axial vector, $B_{s1}$, meson masses. We find these to be slightly below threshold for decay to $BK$ and $B^*K$ respectively.

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BibTeXRIS

Eric B. Gregory, Christine T. H. Davies, Iain D. Kendall, Jonna Koponen, Kit Wong, Eduardo Follana, Elvira Gamiz, G. Peter Lepage, Eike H. Muller, Heechang Na, Junko Shigemitsu. 2010-10-19. Precise B, B_s and B_c meson spectroscopy from full lattice QCD. https://doi.org/10.1103/physrevd.83.014506

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