SEARCH FOR THE RARE DECAY B+ → l+νlγ AT BELLE AND BELLE II

被引：0
|
作者：
Gelb, Moritz [1 ]
机构：
[1] Karlsruhe Inst Technol, Inst Expt Particle Phys ETP, Karlsruhe, Germany
来源：
ACTA PHYSICA POLONICA B | 2018年 / 49卷 / 06期
关键词：
D O I：
10.5506/APhysPolB.49.1121
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The Belle Collaboration reported an upper limit on the partial branching fraction on the rare decay B-vertical bar -> l(vertical bar) nu(l)gamma using the full dataset recorded at the gamma (4S) resonance. The decay allows for the extraction of the first inverse momentum of the light-cone distribution amplitude, an important parameter for QCD factorization for non-leptonic B decays. We present a Monte Carlo study applying an improved tagging algorithm developed for the Belle II experiment. We observe an increase in the signal reconstruction efficiency by a factor of three, improving the expected sensitivity to 3:8 sigma. Furthermore, we give an outlook for the sensitivity of measuring B-vertical bar -> l(vertical bar) nu(l)gamma with the Belle II experiment.
引用
收藏
页码：1121 / 1125
页数：5
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