Speaker
Prof.
Steven Gottlieb
(Indiana University)
Description
We present a calculation of the form factors of the $D\to K l \nu$ and $D\to\pi l \nu$ semileptonic decays at zero momentum transfer, ultimately for the purpose of determining the CKM matrix elements $|{V_{cs}}|$ and $|{V_{cd}}|$. This work uses MILC $N_f=2+1+1$ configurations with the HISQ action for both sea quarks and valence quarks, including several physical mass ensembles and lattice spacings down to $0.042 fm$. The calculation is done directly at $q^2=0$ by employing twisted boundary conditions to tune the child particle momenta. Preliminary results at the physical point and in the continuum limit are achieved through the use of Heavy-Meson Staggered $\chi$PT.
Primary author
Prof.
Steven Gottlieb
(Indiana University)
Co-authors
Aida El-Khadra
(University of Illinois)
Alexei Bazavov
(Indiana University)
Dr
Andreas Kronfeld
(Fermilab)
Carleton DeTar
(University of Utah)
Dr
Chris Bouchard
(William & Mary)
Claude Bernard
(Washington University)
Daping Du
(Syracuse University)
Mr
Doug Toussaint
(University of Arizona)
Dr
Elvira Gamiz
(University of Granada)
Ethan Neil
(University of Colorado, Boulder)
Jack Laiho
(Syracuse University)
Javad Komijani
(TUM)
Jim Simone
(Fermilab)
Paul Mackenzie
(Fermilab)
Robert Sugar
(University of California, Santa Barbara)
Ruth Van de Water
(Fermilab)
Urs Heller
(American Physical Society)
ran zhou
(Fermi National Accelerator Laboratory)
