Speaker
Dr
Thomas Primer
(University of Arizona)
Description
We present a calculation of the $D\to\K,l,\nu$ and $D\to\pi,l,\nu$ semileptonic form factors at $q^2=0$.
These form factors are needed for the determination of the CKM matrix elements $\lvert{V_{cs}}\rvert$ and
$\lvert{V_{cd}}\rvert$ respectively.
This work uses the HISQ action for both valence quarks and sea quarks on MILC $N_f=2+1+1$ configurations, with ensembles including several at the physical pion mass and lattice spacings ranging from $0.12 fm$ to $0.042 fm$.
The calculation employs twisted boundary conditions to calculate the form factors at zero momentum transfer directly.
We use HM$\chi$PT to obtain preliminary results at the physical point and in the continuum limit.
Primary author
Dr
Thomas Primer
(University of Arizona)
