Gregory, E. et al. (2011) Precise B, Bs and Bc meson spectroscopy from full lattice QCD. Physical Review D, 83(1), (doi: 10.1103/PhysRevD.83.014506)
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Publisher's URL: http://dx.doi.org/10.1103/PhysRevD.83.014506
Abstract
We give the first accurate results for B and B<sub>s</sub> meson masses from lattice QCD including the effect of u, d, and s sea quarks, and we improve an earlier value for the B<sub>c</sub> meson mass. By using the highly improved staggered quark (HISQ) 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<sub>B</sub>=5.291(18) GeV, m<sub>B</sub><sub>s</sub>=5.363(11) GeV, and m<sub>B</sub><sub>c</sub>=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<sub>s0</sub>* and axial-vector, B<sub>s1</sub> meson masses. We find these to be slightly below threshold for decay to BK and B<sup>*</sup>K, respectively.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Follana, Dr Eduardo and Gregory, Dr Eric and Koponen, Dr Jonna and Kendall, Mr Iain and Shigemitsu, Prof Junko and Wong, Mr Kit and Davies, Professor Christine |
| Authors: | Gregory, E., Davies, C., Kendall, I., Koponen, J., Wong, K., Follana, E., Gámiz, E., Lepage, G., Müller, E., Na, H., and Shigemitsu, J. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Physical Review D |
| Publisher: | American Physical Society |
| ISSN: | 1550-7998 |
| ISSN (Online): | 1089-4918 |
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