Semileptonic B decays from a NRQCD and D234 action

Shigemitsu, J., Collins, S., Davies, C.T.H. , Hein, J., Horgan, R.R. and Lepage, G.P. (2002) Semileptonic B decays from a NRQCD and D234 action. Physical Review D, 66(7), art 074506. (doi: 10.1103/PhysRevD.66.074506)

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Publisher's URL: http://dx.doi.org/10.1103/PhysRevD.66.074506

Abstract

Semileptonic, B→pi l (ν) over bar, decays are studied on quenched anisotropic lattices using tree-level tadpole improved Symanzik glue, nonrelativistic QCD heavy quark and D234 light quark actions. Constrained fitting methods are applied to extract ground state contributions to two-point and three-point correlators. We agree with previous lattice determinations of the form factors. The major source of systematic error here, as in previous work, comes from the chiral extrapolation to the physical pion mass. Future calculations must work at lighter quark masses to resolve this.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Shigemitsu, Prof Junko and Davies, Professor Christine
Authors: Shigemitsu, J., Collins, S., Davies, C.T.H., Hein, J., Horgan, R.R., and Lepage, G.P.
Subjects:Q Science > QC Physics
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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