Search for Lepton-Number-Violating B → Dll Decays at Belle

被引：0
|
作者：
Seon, Oksu [1 ]
机构：
[1] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan
来源：
QUEST FOR THE ORIGIN OF PARTICLES IN THE UNIVERSE | 2013年
关键词：
Lepton-number violation; Majorana neutrino;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We search for the lepton-number-violating B+ decays in the B+ -> D- l(+) l(+) modes, where l is e or mu, using 772 x 10(6) B (B) over bar pairs accumulated at the (sic)(4S) resonance by the Belle detector at the KEKB e(+) e(-) collider. No evidence for these decays is observed and 90% confidence level upper limits on the branching fractions are obtained for the first time: B(B+ -> D- e(+) e(+)) < 2.6x10(-6), B(B+ -> D- e(+) mu(+)) < 1.8 x 10(-6) and B(B+ -> D- mu(+) mu(+)) < 1.0 x 10(-6).
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页码：339 / 342
页数：4
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