文章基本信息

标题：from B¯0→D∗+ℓ−ν¯ zero-recoil form factor using 2+1+1 flavour HISQ and NRQCD
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作者：J.Harrison ; C.Davies ; M.Wingate on behalf of HPQCD Collaboration 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2016
卷号：256
DOI：10.22323/1.256.0287
语种：English
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present the status of our ongoing calculation of the zero-recoil form factor for the semileptonic decay $\bar{B}^0\rightarrow D^{*+}l^-\bar{\nu}$ using lattice QCD with 2+1+1 flavours of highly improved staggered quarks in the sea (the MILC HISQ configurations) and using non-relativistic QCD for the bottom quark. We combine our result for $ F(1)$ with the latest HFAG average of $\eta_{EW} F(1)|V_{cb}|$ to get a preliminary value for $|V_{cb}|$.