# 36th Annual International Symposium on Lattice Field Theory

Jul 22 – 28, 2018
Kellogg Hotel and Conference Center
EST timezone

## Charmed (and heavier) meson decay constants and heavy neutral meson mixing in the continuum limit using 2+1f of domain wall fermions

Jul 26, 2018, 9:30 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 J Tobias Tsang (University of Edinburgh)

### Description

I will present a status update of RBC/UKQCD's charm (to bottom) physics program based on ensembles with $N_f=2+1$ flavours of domain wall fermions featuring physical pion masses. After a brief review of our program, the main focus will be on mesonic decay constants and neutral meson mixing in the charm and bottom sector, where results for the bottom sector are obtained from an extrapolation from the (heavier than) charm-quark mass region to the physical $b$-quark mass. In particular, I will focus on the ratio of the pseudo-scalar decay constants $f_{D_s}/f_{D}$ and on the extrapolation of the ratio $\xi$ to the $b$-quark mass.

### Primary author

Dr J Tobias Tsang (University of Edinburgh)

### Co-authors

Dr Andreas Juettner (University of Southampton) Prof. Luigi Del Debbio (University of Edinburgh) Dr Nicolas Garron (University of Liverpool) Oliver Witzel Witzel (University of Colorado Boulder) Prof. Peter Boyle (University of Edinburgh)

 Slides