Form factors for $B$ to $Kll$ semileptonic decay from three-flavor lattice QCD

Abstract

We study the $B\to K{l}^{+}{l}^{-}$ semileptonic decay process in three-flavor lattice QCD. We analyze several ensembles generated by the MILC collaboration at different lattice spacings and sea-quark masses. We use the asqtad improved staggered action for the light quarks and the clover action with the Fermilab interpretation for the heavy $b$ quark. We present preliminary results for the vector current induced form factors for a range of kaon energies. Our analysis includes chiral and continuum extrapolations based on SU(2) staggered χPT.

7 pages, 4 figures, presented at The XXIX International Symposium on Lattice Field Theory - Lattice 2011, July 10-16, 2011, Squaw Valley, Lake Tahoe, California

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Cited by in corpus (5)

• Precise Calculation of the Dilepton Invariant-Mass Spectrum and the Decay Rate in $B^{\pm }\to {\pi }^{\pm }{\mu }^{+}{\mu }^{-}$ in the SM
• Standard Model Heavy Flavor physics on the Lattice
• Progress on semi-leptonic $B_{(s)}$ decays
• Complementarity of Bs->mu+mu- and B-> K l+l- in New Physics searches
• Lattice Calculations of B to K/K*l+l- form factors