Improved B -> pi l nu_l form factors from the lattice

UKQCD Collaboration; K. C. Bowler; L. Del Debbio; J. M. Flynn; L. Lellouch; V. Lesk; C. M. Maynard; J. Nieves; D. G. Richards

doi:10.1016/S0370-2693(00)00754-1

Improved B -> pi l nu_l form factors from the lattice

High Energy Physics - Lattice 2014-11-17 v3 High Energy Physics - Phenomenology

Authors: UKQCD Collaboration , K. C. Bowler , L. Del Debbio , J. M. Flynn , L. Lellouch , V. Lesk , C. M. Maynard , J. Nieves , D. G. Richards

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Abstract

We present the results of a lattice computation of the form factors for B^0 ->pi^- l^+nu_l decays near zero-recoil. These results will allow a determination of the CKM matrix element |Vub| when measurements of the differential decay rate become available. We also provide models for extrapolation of the form factors and rate to the full recoil range. Our computation is performed in the quenched approximation to QCD on a 24^3x48 lattice at beta=6.2, using a non-perturbatively O(a)-improved action. The masses of all light valence quarks involved are extrapolated to their physical values.

Keywords

B meson decays form factors CKM matrix lattice QCD quenched approximation

Cite

@article{arxiv.hep-lat/9911011,
  title  = {Improved B -> pi l nu_l form factors from the lattice},
  author = {UKQCD Collaboration and K. C. Bowler and L. Del Debbio and J. M. Flynn and L. Lellouch and V. Lesk and C. M. Maynard and J. Nieves and D. G. Richards},
  journal= {arXiv preprint arXiv:hep-lat/9911011},
  year   = {2014}
}

Comments

8 Pages, 4 colour figures, Accepted for Publication in Phys.Lett.B. Typset in REVTeX 3.1 added figure and table with minor text modification

Improved B -> pi l nu_l form factors from the lattice

Abstract

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