Future experimental improvement for the search of lepton-number-violating processes in the eμ sector

被引：10

作者：

Yeo, Beomki ^{[1
]}

Kuno, Yoshitaka ^{[2
]}

Lee, MyeongJae ^{[3
]}

Zuber, Kai ^{[4
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Phys, Daejeon 34141, South Korea

[2] Osaka Univ, Grad Sch Sci, Dept Phys, Toyonaka, Osaka 5600043, Japan

[3] Inst for Basic Sci Korea, Ctr Ax & Precis Phys Res, Daejeon 34051, South Korea

[4] Tech Univ Dresden, Inst Nucl & Particle Phys, D-01069 Dresden, Germany

来源：

PHYSICAL REVIEW D | 2017年 / 96卷 / 07期

关键词：

CAPTURE; CONVERSION; ELECTRON; PHYSICS; DECAY; LIMIT; AL; SI;

D O I：

10.1103/PhysRevD.96.075027

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The conservation of lepton flavor and total lepton number are no longer guaranteed in the Standard Model after the discovery of neutrino oscillations. The mu(-)+ N(A, Z) -> e(+) N(A, Z - 2) conversion in a muonic atom is one of the most promising channels to investigate the lepton number violation processes, and measurement of the mu(-) e(+) conversion is planned in future, mu(-) - e(-) conversion experiments with a muonic atom in a muon-stopping target. This article discusses experimental strategies to maximize the sensitivity of the mu(-) - e(+) conversion experiment by introducing the new requirement of the mass relation of M(A, Z - 2) < M(A, Z - 1), where M(A, Z) is the mass of the muon-stopping target nucleus, to eliminate the backgrounds from radiative muon capture. The sensitivity of the mu(-) - e(+) conversion is expected to be improved by 4 orders of magnitude in forthcoming experiments using a proper target nucleus that satisfies the mass relation. The most promising isotopes found are Ca-40 and S-32.

引用

页数：8

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