# The 34th International Symposium on Lattice Field Theory (Lattice 2016)

24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

## Kaon semileptonic decays with $N_f=2+1+1$ HISQ fermions and physical light quark masses

28 Jul 2016, 14:20
20m
Building 67 Room 1003 (Highfield Campus, University of Southampton)

### Building 67 Room 1003

#### Highfield Campus, University of Southampton

Highfield Campus, Southampton SO17 1BJ, UK
Talk Weak Decays and Matrix Elements

### Speaker

Dr Elvira Gamiz (University of Granada)

### Description

We present an update of our calculation of the $K_{\ell 3}$ form factor $f_+^{K \pi}(0)$, with added statistics and the inclusion of new ensembles with smaller lattice spacing. In addition, we now also include a study of finite volume effects using a version of staggered ChPT that includes the effects of twisted boundary conditions.We also examine the implications for the unitarity of the CKM matrix in the first row by combining these improved results together with $N_f=2+1+1$ MILC results for light decay constants.

### Primary author

Dr Elvira Gamiz (University of Granada)

 Slides