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

D meson semileptonic form factors with HISQ valence and sea quarks

29 Jul 2016, 15:20
Building 67 Room 1003 (Highfield Campus, University of Southampton)

Building 67 Room 1003

Highfield Campus, University of Southampton

Talk Weak Decays and Matrix Elements Weak Decays and Matrix Elements


Prof. Steven Gottlieb (Indiana University)


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)


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)

Presentation Materials

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