Lattice QCD calculation of form factors describing the rare decaysB→K*ℓ+ℓ−andBs→ϕℓ+ℓ−

2013/10/31 by R.R. Horgan, Ronald R. Horgan, Zhaofeng Liu +2 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph

paper · pdf · doi:10.1103/physrevd.89.094501

published as Phys. Rev. D 89, 094501 (2014) · 23 pages. Version 3 (accepted to Phys. Rev. D) includes interpolations to the physical strange quark mass. Central values shift by less than 1 sigma. Tables and figures updated accordingly

arxiv created 2014/04/18 · openalex publication_date 2014/05/05 · arxiv updated 2014/05/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04

Abstract

The rare decays B⁰\ensuremath→K^*0\ensuremathμ⁺\ensuremathμ^\ensuremath- and B_s\ensuremath→\ensuremathφ\ensuremathμ⁺\ensuremathμ^\ensuremath- are now being observed with enough precision to test Standard Model predictions. A full understanding of these decays requires accurate determinations of the corresponding hadronic form factors. Here we present results of lattice QCD calculations of the B\ensuremath→K^* and B_s\ensuremath→\ensuremathφ form factors. We also determine the form factors relevant for the decays B_s\ensuremath→K^*\ensuremathℓ\ensuremathν and B_s\ensuremath→K^*0\ensuremathℓ⁺\ensuremathℓ^\ensuremath-. We use full-QCD configurations including 2+1 flavors of sea quarks using an improved staggered action, and we employ lattice nonrelativistic QCD to describe the bottom quark.

Citations

• An estimate of the B→K*γ decay form factor
• Review of Particle Physics
• Constraints on Form Factors for Exclusive Semileptonic Heavy to Light Meson Decays
• Chiral perturbation theory for B→D and B→D semileptonic transition matrix elements at zero recoil
• B→D*lνandB→Dlνform factors in staggered chiral perturbation theory
• Precise determination of the lattice spacing in full lattice QCD
• |Vub| from exclusive semileptonic B→π decays

Cited by

• Calculation of B⁰ → K^*0 μ⁺ μ^- and B_s⁰ → ϕμ⁺ μ^- observables using form factors from lattice QCD
• Rare B decays using lattice QCD form factors