Pure leptonic radiative decays B-+/-,D-s->l nu gamma and the annihilation graph

被引：49

作者：

Atwood, D

Eilam, G

Soni, A

机构：

[1] BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973

[2] TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-32000 HAIFA,ISRAEL

来源：

MODERN PHYSICS LETTERS A | 1996年 / 11卷 / 13期

关键词：

D O I：

10.1142/S0217732396001090

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Pure leptonic radiative decays of heavy-light mesons are calculated using a very simple nonrelativistic model. For B-+/- the dominant contribution originates from photon emission from light initial quark. Emission of the photon overcomes the helicity suppression and leads to Br(B-+/- --> l nu gamma) similar to 3.5 x 10(-6) (which is about 16 times more than Br(B-+/- --> mu + v)). Also, we find Br(D-s --> l nu gamma) similar to 2.6 x 10(-5). The importance of these reactions in clarifying the dynamics of the annihilation graph is emphasized.

引用

页码：1061 / 1067

页数：7

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