Semileptonic D-decays and Lattice QCD

Abstract

We explore four different strategies to extract the D-meson semileptonic decay form factors from the Green functions computed in QCD numerically on the lattice. From our numerical tests we find that two such strategies, based on the use of double ratios of 3-point correlation functions, lead to an appreciable reduction of systematic uncertainties. This is an important step in reducing the overall uncertainty in the lattice QCD results for the D-decay form factors which are needed to determine the CKM entries |Vcd| and |Vcs| experimentally, that are nowadays known by imposing the unitarity of the CKM matrix.

7pages, proceedings write-up for Lattice 2007

References in corpus (5)

• Aharonov-Bohm effect and nucleon-nucleon phase shifts on the lattice
• On the discretization of physical momenta in lattice QCD
• Lattice QCD calculation of $\bar{B}\to Dl\bar{\nu }$ decay form factors at zero recoil
• The K -> pi vector form factor at zero momentum transfer on the lattice
• Hadronic form factors in Lattice QCD at small and vanishing momentum transfer

Cited by in corpus (4)

• Flavor Physics in the Quark Sector
• D*-->Dpi and D*-->Dgamma decays: Axial coupling and Magnetic moment of D* meson
• D-decays with unquenched Lattice QCD
• Theoretical Perspectives: XLIII Rencontres de Moriond - QCD