$D \rightarrow Klν$ semileptonic decay using lattice QCD with HISQ at physical pion masses

Bipasha Chakraborty; Christine Davies; Jonna Koponen; G Peter Lepage

doi:10.1051/epjconf/201817513027

paper

$D \to K l ν$ semileptonic decay using lattice QCD with HISQ at physical pion masses

arXiv:1710.07334 · doi:10.1051/epjconf/201817513027

Abstract

The quark flavor sector of the Standard Model is a fertile ground to look for new physics effects through a unitarity test of the Cabbibo-Kobayashi-Maskawa (CKM) matrix. We present a lattice QCD calculation of the scalar and the vector form factors (over a large $q^{2}$ region including $q^{2} = 0$ ) associated with the $D \to K l ν$ semi-leptonic decay. This calculation will then allow us to determine the central CKM matrix element, $V_{cs}$ in the Standard Model, by comparing the lattice QCD results for the form factors and the experimental decay rate. This form factor calculation has been performed on the $N_{f} = 2 + 1 + 1$ MILC HISQ ensembles with the physical light quark masses.

Proceedings for the 35th International Symposium on Lattice Field Theory (Lattice 2017), 8 pages, 5 figures

References in corpus (1)

Measurement of D0 -> pilnu (Klnu) Form Factors and Absolute Branching Fractions

D→Klν semileptonic decay using lattice QCD with HISQ at physical pion masses

Abstract

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$D \to K l ν$ semileptonic decay using lattice QCD with HISQ at physical pion masses