Probing Majorana neutrinos in rare π+ → e+e+μ-ν decays

被引：44

作者：

Cvetic, Gorazd ^{[1
,2
]}

Dib, Claudio ^{[1
,2
]}

Kim, C. S. ^{[3
,4
]}

机构：

[1] Univ Tecn Federico Santa Maria, Ctr Cient Tecnol Valparaiso, Valparaiso, Chile

[2] Univ Tecn Federico Santa Maria, Dept Phys, Valparaiso, Chile

[3] Yonsei Univ, Dept Phys, Seoul 120749, South Korea

[4] Yonsei Univ, IPAP, Seoul 120749, South Korea

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2012年 / 06期

关键词：

Rare Decays; Neutrino Physics; STERILE NEUTRINOS; LEPTON-NUMBER; UPPER-BOUNDS; OSCILLATIONS; MATRIX; MASS; LHC;

D O I：

10.1007/JHEP06(2012)149

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 study the rare decays of charged pi mesons, pi(+) -> e(+)e(+)mu(-)(nu) over bar (mu) and pi(+) -> e(+)mu(-)e(+)nu(e) induced by a sterile neutrino N with a mass in the range m(mu) < m(N) < m(pi). The first process violates Lepton Number by two units and so occurs only if N is Majorana, while the second process conserves Lepton Number and occurs irrespective of the Majorana or Dirac character of N. We study a way to distinguish the Majorana vs. Dirac character of N in these processes using the mum spectrum. We also find that the branching ratios could be at the reach of high luminosity experiments like Project X at FNAL or any proposed neutrino (or muon) factories worldwide.

引用

页数：23

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