论文标题
从$ q^2 $ moments提取包含$ v_ {cb} $的首次提取
First extraction of inclusive $V_{cb}$ from $q^2$ moments
论文作者
论文摘要
我们使用dilepton不变质量的矩，$ q^2 $提出了$ v_ {cb} $的第一个确定$ v_ {cb} $。这些矩是重新分析的不变量，并取决于减少的非扰动参数。这减少了一条新的路径，将这些参数提取到$ 1/m_b^4 $纯粹是从数据中提取的，从而降低了$ v_ {cb} $的不确定性。在本文中，我们使用此方法提出了$ v_ {cb} $的首次确定。结合Belle和Belle II的最新测量$ Q^2 $矩，我们的默认贴合给了$ | v_ {cb} | =（41.69 \ pm 0.63）\ cdot 10^{ - 3} $。该结果提出了重要的独立交叉检查，并且与先前使用Lepton Energy和Hadronic不变的质量矩进行的先前最新包含性测定一致。
We present the first determination of $V_{cb}$ from inclusive $B\to X_c \ell \barν_\ell$ using moments of the dilepton invariant mass, $q^2$. These moments are reparametrization invariant quantities and depend on a reduced set of non-perturbative parameters. This reduced opens a new path to extract these parameters up to $1/m_b^4$ purely from data and thereby reducing the uncertainty on $V_{cb}$. In this paper, we present our first determination of $V_{cb}$ using this method. Combining the recent measurements of $q^2$ moments by Belle and Belle II, our default fit gives $|V_{cb}| = (41.69\pm 0.63)\cdot 10^{-3}$. This results presents an important independent cross check of, and is consistent with, the previous state-of-the-art inclusive determinations using lepton energy and hadronic invariant mass moments.
