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| V_{cb} |

from the semileptonic decay

B \to D ℓ {\bar{ν}}_{ℓ}

and the properties of the D -meson distribution amplitude

【2h】

$| V_{cb} |$ from the semileptonic decay $B \to D ℓ {\bar{ν}}_{ℓ}$ and the properties of the D -meson distribution amplitude

机译： $|Vcb|来自半瘦衰变B\toDℓν。ℓ和D介子分布振幅的性质展开▼代理获取本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。免费外文文献都是OA文献，本网站仅为用户提供查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，请知悉并谅解免费页面导航摘要著录项相似文献相关主题摘要 The improved QCD light-cone sum rule (LCSR) provides an effective way to deal with the heavy-to-light transition form factors (TFFs). Firstly, we adopt the improved LCSR approach to deal with the TFF up to twist-4 accuracy. Due to the elimination of the most uncertain twist-3 contribution and the large suppression of the twist-4 contribution, the obtained LCSR shall provide us a good platform for testing the D -meson leading-twist DA. For the purpose, we suggest a new model for the D -meson leading-twist DA ( ), whose longitudinal behavior is dominantly determined by a parameter B . Moreover, we find its second Gegenbauer moment . Varying B within certain region, one can conveniently mimic the D -meson DA behavior suggested in the literature. Inversely, by comparing the estimations with the experimental data on the D -meson involved processes, one can get a possible range for the parameter B and a determined behavior for the D -meson DA. Secondly, we discuss the TFF at the maximum recoil region and present a detailed comparison of it with the pQCD estimation and the experimental measurements. Thirdly, by applying the LCSR on , we study the CKM matrix element together with its uncertainties by adopting two types of processes, i.e. the -type and the -type. It is noted that a smaller shows a better agreement with the experimental value on . For example, for the case of , we obtain and , whose first (second) uncertainty comes from the squared average of the mentioned theoretical (experimental) uncertainties. 展开▼ 机译：改进的QCD圆锥总和规则（LCSR）提供了一种有效的方法来处理从重到轻的过渡形状因子（TFF）。首先，我们采用改进的LCSR方法来处理TFF，直到达到Twist-4精度。由于消除了最不确定的3号扭曲贡献并大大抑制了4号扭曲贡献，因此获得的LCSR将为我们提供一个测试D介导超扭曲DA的良好平台。为此，我们为D介子超前扭曲DA（）提出了一个新模型，该模型的纵向行为主要由参数B确定。此外，我们找到了它的第二个盖根鲍尔时刻。在特定区域内改变B，可以方便地模仿文献中提出的D介子DA行为。相反，通过将估计值与涉及D介子的过程的实验数据进行比较，可以得到参数B的可能范围和D介子DA的确定行为。其次，我们讨论最大后坐力区域的TFF，并与pQCD估算值和实验测量值进行详细比较。第三，通过在上应用LCSR，我们通过采用两种类型的过程，即-type和-type，研究了CKM矩阵元素及其不确定性。请注意，较小的表示与上的实验值更好的一致性。例如，对于，我们获得和，其第一个（第二个）不确定性来自所提到的理论（实验）不确定性的平方平均值。展开▼ 著录项作者 Fu, Hai-Bing(Department of Physics, Chongqing University, Chongqing, 401331, PR China); Wu, Xing-Gang(Department of Physics, Chongqing University, Chongqing, 401331, PR China); Han, Hua-Yong(Department of Physics, Chongqing University, Chongqing, 401331, PR China); Ma, Yang(Department of Physics, Chongqing University, Chongqing, 401331, PR China); Zhong, Tao(Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, PR China); 展开▼ 作者单位展开▼ 年度 2014 总页数原文格式 PDF 正文语种中图分类相似文献外文文献中文文献专利 1. Prevalent false positives of azoospermia factor a (AZFa) microdeletions caused by single-nucleotide polymorphism rs72609647 in the sY84 screening of male infertility [J] . Qing Wu, Hui-Juan Shi, Guo-Wu Chen, 亚洲男性学杂志（英文版）
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