Radiative leptonic decay B → γlvl with subleading power corrections

被引：67

作者：

Beneke, M. ^{[1
]}

Braun, V. M. ^{[2
]}

Ji, Yao ^{[2
]}

Wei, Yan-Bing ^{[1
,3
]}

机构：

[1] Tech Univ Munich, Phys Dept T31, James Franck Str 1, D-85748 Garching, Germany

[2] Univ Regensburg, Inst Theoret Phys, Univ Str 31, D-93040 Regensburg, Germany

[3] Chinese Acad Sci, Inst High Energy Phys, POB 918 4, Beijing 100049, Peoples R China

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 07期

关键词：

Heavy Quark Physics; Perturbative QCD; Resummation; MESON DISTRIBUTION AMPLITUDE; FORM-FACTORS; SUM-RULES; QCD; FACTORIZATION; SYMMETRY;

D O I：

10.1007/JHEP07(2018)154

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We reconsider the QCD predictions for the radiative decay B -> gamma lv(l) with an energetic photon in the fi nal state by taking into account the 1/E-gamma, 1/m(b) power-suppressed hard-collinear and soft corrections from higher-twist B-meson light-cone distribution amplitudes (LCDAs). The soft contribution is estimated through a dispersion relation and light-cone QCD sum rules. The analysis of theoretical uncertainties and the dependence of the decay form factors on the leading-twist LCDA phi+(omega) shows that the latter dominates. The radiative leptonic decay is therefore well suited to constrain the parameters of phi+(omega), including the fi rst inverse moment, 1/lambda(B), from the expected high-statistics data of the BELLE II experiment.

引用

页数：35

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