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# 36th Annual International Symposium on Lattice Field Theory

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

## $B \to \pi \ell \nu$ and $B \to \pi\ell\ell$ decays with HISQ/NRQCD valence quarks on $N_f=2+1$ asqtad ensembles.

Jul 27, 2018, 4:50 PM
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

Christopher Bouchard (Ohio State)

### Description

We discuss a calculation of the form factors for the flavor-changing charged current $b\to u$ and the flavor-changing neutral current $b\to d$ semileptonic decays, $B\to \pi\ell\nu$ and $B\to\pi\ell\ell$. HISQ light and NRQCD $b$ valence quarks are simulated on the MILC $N_f=2+1$ asqtad ensembles, including pion momenta that cover the full kinematic range of the decay. These data are analyzed using a hard pion ChPT motivated modified z-expansion developed in previous work. Preliminary results and phenomenological implications are discussed.

### Co-authors

Dr Christopher Monahan (University of Washington) Prof. Junko Shigemitsu (Ohio State) Prof. Peter Lepage (Cornell University)

 Slides