Perturbative corrections to b -> d form factors in qcd
文献类型：期刊论文
| 作者 | Wang, Yu-Ming1,2; Wei, Yan-Bing3,4; Shen, Yue-Long5; Lu, Cai-Dian3,4 |
| 刊名 | Journal of high energy physics
 |
| 出版日期 | 2017-06-13 |
| 期号 | 6页码:47 |
| 关键词 | Heavy quark physics Perturbative qcd Resummation |
| ISSN号 | 1029-8479 |
| DOI | 10.1007/jhep06(2017)062 |
| 通讯作者 | Wang, yu-ming(yu-ming.wang@univie.ac.at) |
| 英文摘要 | We compute perturbative qcd corrections to b -> d form factors at leading power in lambda/m(b), at large hadronic recoil, from the light-cone sum rules (lcsr) with b-meson distribution amplitudes in hqet. qcd factorization for the vacuum-to-b-meson correlation function with an interpolating current for the d-meson is demonstrated explicitly at one loop with the power counting scheme m(c) similar to o (root lambda m(b)). the jet functions encoding information of the hard-collinear dynamics in the above-mentioned correlation function are complicated by the appearance of an additional hard-collinear scale mc, compared to the counterparts entering the factorization formula of the vacuum-to-b-meson correction function for the construction of b -> pi from factors. inspecting the next-to-leading-logarithmic sum rules for the form factors of b -> dlv indicates that perturbative corrections to the hard-collinear functions are more profound than that for the hard functions, with the default theory inputs, in the physical kinematic region. we further compute the subleading power correction induced by the three-particle quark-gluon distribution amplitudes of the b-meson at tree level employing the background gluon field approach. the lcsr predictions for the semileptonic b -> dlv form factors are then extrapolated to the entire kinematic region with the z-series parametrization. phenomenological implications of our determinations for the form factors f(bd)(+,0) (q(2)) are explored by investigating the (differential) branching fractions and the r(d) ratio of b -> dlv and by determining the ckm matrix element vertical bar v-cb vertical bar from the total decay rate of b -> d mu nu. |
| WOS关键词 | MESON DISTRIBUTION AMPLITUDE ; COLLINEAR EFFECTIVE THEORY ; CB-VERTICAL-BAR ; CONE SUM-RULES ; QUARK MASS ; SEMILEPTONIC DECAYS ; ANOMALOUS DIMENSION ; LARGE RECOIL ; FACTORIZATION ; SYMMETRY |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000403244000001 |
| 出版者 | SPRINGER |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177349 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Wang, Yu-Ming |
| 作者单位 | 1.Nankai Univ, Sch Phys, Weijin Rd 94, Tianjin 300071, Peoples R China 2.Univ Vienna, Fak Phys, Boltzmanngasse 5, A-1090 Vienna, Austria 3.Chinese Acad Sci, Inst High Energy Phys, Yuquan Rd 19, Beijing 100049, Peoples R China 4.Univ Chinese Acad Sci, Sch Phys, Yuquan Rd 19, Beijing 100049, Peoples R China 5.Ocean Univ China, Coll Informat Sci & Engn, Songling Rd 238, Qingdao 266100, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Yu-Ming,Wei, Yan-Bing,Shen, Yue-Long,et al. Perturbative corrections to b -> d form factors in qcd[J]. Journal of high energy physics,2017(6):47. |
| APA | Wang, Yu-Ming,Wei, Yan-Bing,Shen, Yue-Long,&Lu, Cai-Dian.(2017).Perturbative corrections to b -> d form factors in qcd.Journal of high energy physics(6),47. |
| MLA | Wang, Yu-Ming,et al."Perturbative corrections to b -> d form factors in qcd".Journal of high energy physics .6(2017):47. |
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来源：高能物理研究所
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