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Improved Constraints on $B \to \pi\ell \bar\nu_{\ell}$ Form Factors

High Energy Physics - Phenomenology 2016-09-01 v1
Authors: Damir Becirevic
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Abstract

The behavior of the \bpi\bpi form factors in the entire physical range is examined in a model independent way. Unitarity bounds are further constrained by the lattice results (APE). From this analysis, we obtain f+(0)=0.38±.03f^{+}(0) = 0.38 \pm .03 if the B∗B^{*}-pole dominance behavior is assumed. However, to get the information on the behavior of the form factor f+f^{+}, QSR results are included. We see the deviations from the pole dominance due to the contributions of the higher singularities which are to be treated with more precise lattice data.

Keywords

B meson decay form factors lattice QCD pole dominance QSR

Cite

@article{arxiv.hep-ph/9603298,
  title  = {Improved Constraints on $B \to \pi\ell \bar\nu_{\ell}$ Form Factors},
  author = {Damir Becirevic},
  journal= {arXiv preprint arXiv:hep-ph/9603298},
  year   = {2016}
}

Comments

13 pages, latex, 5 figures

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