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B to rho ell nu form factors in lattice QCD

High Energy Physics - Lattice 2011-01-27 v2 High Energy Physics - Phenomenology
Authors: K. C. Bowler , J. F. Gill , C. M. Maynard , J. M. Flynn
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Abstract

We present results from quenched lattice QCD for the form factors for the decay B→ρlνB\to\rho l\nu. The calculations are performed using a nonperturbatively improved action and operators at two values of the lattice spacing. The bottom quark mass is reached by extrapolation from simulations performed with heavy quark masses around the charm mass. Our primary result is for the partially integrated decay rate ΓPI\Gamma_{PI} over the range 12.7\gev2<q2<18.2\gev212.7\gev^2 < q^2 < 18.2\gev^2: \Gamma_PI = (4.9^{+12}_{-10}{+0}_{-14}) X 10^12 s^-1

Keywords

lattice QCD form factors B meson decay quenched approximation heavy quark effective theory

Cite

@article{arxiv.hep-lat/0402023,
  title  = {B to rho ell nu form factors in lattice QCD},
  author = {K. C. Bowler and J. F. Gill and C. M. Maynard and J. M. Flynn},
  journal= {arXiv preprint arXiv:hep-lat/0402023},
  year   = {2011}
}

Comments

15 pages, 5 figures, corrected abstract, typos corrected

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