Precise B, B_s and B_c meson spectroscopy from full lattice QCD
| Autor: | Gregory, Eric B., Davies, Christine T. H., Kendall, Iain D., Koponen, Jonna, Wong, Kit, Follana, Eduardo, Gamiz, Elvira, Lepage, G. Peter, Muller, Eike H., Na, Heechang, Shigemitsu, Junko |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Phys.Rev.D83:014506,2011 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.83.014506 |
| Popis: | 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. Comment: 22 pages, 19 figures |
| Databáze: | arXiv |
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