### Abstract

In this write-up we review and update our recent lattice QCD calculation of B→ K∗, B_{s}→ Ø, and B_{s}→ K∗ form factors [1]. These unquenched calculations, performed in the low-recoil kinematic regime, provide a significant improvement over the use of extrapolated light cone sum rule results. The fits presented here include further kinematic constraints and estimates of additional correlations between the different form factor shape parameters. We use these form factors along with Standard Model determinations of Wilson coefficients to give Standard Model predictions for several observables [2]. The modest improvements to the form factor fits lead to improved determinations of FL, the fraction of longitudinally polarized vector mesons, but have little effect on most other observables.

Original language | English (US) |
---|---|

Article number | 372 |

Journal | Proceedings of Science |

Volume | Part F130500 |

State | Published - 2014 |

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### ASJC Scopus subject areas

- General

### Cite this

*Proceedings of Science*,

*Part F130500*, [372].

**Rare B decays using lattice QCD form factors.** / Horgan, R. R.; Liu, Z.; Meinel, Stefan; Wingate, M.

Research output: Contribution to journal › Article

*Proceedings of Science*, vol. Part F130500, 372.

}

TY - JOUR

T1 - Rare B decays using lattice QCD form factors

AU - Horgan, R. R.

AU - Liu, Z.

AU - Meinel, Stefan

AU - Wingate, M.

PY - 2014

Y1 - 2014

N2 - In this write-up we review and update our recent lattice QCD calculation of B→ K∗, Bs→ Ø, and Bs→ K∗ form factors [1]. These unquenched calculations, performed in the low-recoil kinematic regime, provide a significant improvement over the use of extrapolated light cone sum rule results. The fits presented here include further kinematic constraints and estimates of additional correlations between the different form factor shape parameters. We use these form factors along with Standard Model determinations of Wilson coefficients to give Standard Model predictions for several observables [2]. The modest improvements to the form factor fits lead to improved determinations of FL, the fraction of longitudinally polarized vector mesons, but have little effect on most other observables.

AB - In this write-up we review and update our recent lattice QCD calculation of B→ K∗, Bs→ Ø, and Bs→ K∗ form factors [1]. These unquenched calculations, performed in the low-recoil kinematic regime, provide a significant improvement over the use of extrapolated light cone sum rule results. The fits presented here include further kinematic constraints and estimates of additional correlations between the different form factor shape parameters. We use these form factors along with Standard Model determinations of Wilson coefficients to give Standard Model predictions for several observables [2]. The modest improvements to the form factor fits lead to improved determinations of FL, the fraction of longitudinally polarized vector mesons, but have little effect on most other observables.

UR - http://www.scopus.com/inward/record.url?scp=85030120588&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85030120588&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85030120588

VL - Part F130500

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

M1 - 372

ER -