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36th Annual International Symposium on Lattice Field Theory

22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

Heavy quark scaling of $B \to \pi \ell \nu$ form factors with Mobius domain wall fermions

Jul 26, 2018, 10:10 AM
20m
103 (Kellogg Hotel and Conference Center)

103

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Weak Decays and Matrix Elements

Speaker

Dr Brian Colquhoun (KEK)

Description

We report on the progress of our calculation of form factors for the exclusive semileptonic decay of B mesons to pions on $2+1$ flavour lattices with spacings from $0.080~\mathrm{fm}$ down to $0.044~\mathrm{fm}$. Using the Mobius domain wall fermion action for all quarks, we simulate pions with masses down 230 MeV over a range of momenta, and extrapolate to the bottom quark mass by utilising multiple heavy quark masses up to 2.44 times the mass of the charm quark. We discuss how the form factors depend on the pion mass, the heavy quark mass, lattice spacing, and momentum transfer.

 Slides