Precise B, Bs, and Bc meson spectroscopy from full lattice QCD

Gregory, E.B. ; Davies, C.T.H. ; Kendall, I.D. ; Koponen, J. ; Wong, K. ; Follana, E. (Universidad de Zaragoza) ; Gámiz, E. ; Lepage, G.P. ; Müller, E.H. ; Na, H. ; Shigemitsu, J.

Resumen: We give the first accurate results for B and Bs meson masses from lattice QCD including the effect of u, d, and s sea quarks, and we improve an earlier value for the Bc 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: mB 1/4 5:291ð18Þ GeV, mBs 1/4 5:363ð11Þ GeV, and mBc 1/4 6:280ð10Þ 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, B0s0 and axial-vector, Bs1 meson masses. We find these to be slightly below threshold for decay to BK and B0K, respectively.

Idioma: Inglés

DOI: 10.1103/PhysRevD.83.014506

Año: 2011

Publicado en: PHYSICAL REVIEW. D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY 83, 1 (2011), 014506 [22 p.]
ISSN: 1550-7998

Factor impacto JCR: 4.558 (2011)

Categ. JCR: PHYSICS, PARTICLES & FIELDS rank: 6 / 27 = 0.222 (2011) - Q1 - T1
Categ. JCR: ASTRONOMY & ASTROPHYSICS rank: 11 / 56 = 0.196 (2011) - Q1 - T1

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Física Teórica (Departamento de Física Teórica)