English

Heavy-meson semileptonic decays for the Standard Model and beyond

High Energy Physics - Lattice 2013-12-12 v1 High Energy Physics - Phenomenology
Authors: Yuzhi Liu , Ran Zhou , Jon A. Bailey , A. Bazavov , C. Bernard , C. M. Bouchard , C. DeTar , Daping Du , A. X. El-Khadra , J. Foley , E. D. Freeland , E. Gámiz , Steven Gottlieb , U. M. Heller , R. D. Jain , Jongjeong Kim , A. S. Kronfeld , J. Laiho L. Levkova , P. B. Mackenzie , Y. Meurice , D. Mohler , E. T. Neil , M. B. Oktay , Si-Wei Qiu , J. N. Simone , R. Sugar , D. Toussaint , R. S. Van de Water
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Abstract

We calculate the form factors for the semileptonic decays Bs→KℓνB_s\to K\ell\nu and B→KℓℓB\to K\ell\ell with lattice QCD. We work at several lattice spacings and a range of light quark masses, using the MILC 2+1-flavor asqtad ensembles. We use the Fermilab method for the bb quark. We obtain chiral-continuum extrapolations for EKE_K up to ∼1.2\sim1.2 GeV and then extend to the entire kinematic range with the model-independent zz expansion.

Keywords

semileptonic decays form factors lattice QCD heavy mesons Standard Model beyond Standard Model z expansion

Cite

@article{arxiv.1312.3197,
  title  = {Heavy-meson semileptonic decays for the Standard Model and beyond},
  author = {Yuzhi Liu and Ran Zhou and Jon A. Bailey and A. Bazavov and C. Bernard and C. M. Bouchard and C. DeTar and Daping Du and A. X. El-Khadra and J. Foley and E. D. Freeland and E. Gámiz and Steven Gottlieb and U. M. Heller and R. D. Jain and Jongjeong Kim and A. S. Kronfeld and J. Laiho L. Levkova and P. B. Mackenzie and Y. Meurice and D. Mohler and E. T. Neil and M. B. Oktay and Si-Wei Qiu and J. N. Simone and R. Sugar and D. Toussaint and R. S. Van de Water},
  journal= {arXiv preprint arXiv:1312.3197},
  year   = {2013}
}

Comments

7. pp, 6 figs. Presented at the 31st International Symposium on Lattice Field Theory - LATTICE 2013, July 29 - August 3, 2013, Mainz, Germany

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