出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：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 CKMentries |Vcd| and |Vcs| experimentally, and thus to check the CKMunitarity.
