文章基本信息

标题：Semileptonic D-decays and Lattice QCD
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作者：B. Haas ; D. Becirevic ; F. Mescia 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2007
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.