Double beta decay and neutrino mass models

被引：33

作者：

Helo, J. C. ^{[1
]}

Hirsch, M. ^{[2
]}

Ota, T. ^{[3
]}

Fereira dos Santos, F. A. ^{[4
]}

机构：

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

[2] Univ Valencia, CSIC, Inst Fis Corpuscular, AHEP Grp, E-46071 Valencia, Spain

[3] Saitama Univ, Dept Phys, Saitama 3388570, Japan

[4] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22451900 Rio De Janeiro, Brazil

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2015年 / 05期

关键词：

Beyond Standard Model; Neutrino Physics; LEPTON NUMBER; SUPERSYMMETRY; SUPERFORMULA; CONSTRAINTS; LEPTOQUARK; VIOLATION; MIXINGS; SEESAW; SCALE;

D O I：

10.1007/JHEP05(2015)092

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：

Neutrinoless double beta decay allows to constrain lepton number violating extensions of the standard model. If neutrinos are Majorana particles, the mass mechanism will always contribute to the decay rate, however, it is not a priori guaranteed to be the dominant contribution in all models. Here, we discuss whether the mass mechanism dominates or not from the theory point of view. We classify all possible (scalar-mediated) short-range contributions to the decay rate according to the loop level, at which the corresponding models will generate Majorana neutrino masses, and discuss the expected relative size of the different contributions to the decay rate in each class. Our discussion is general for models based on the SM group but does not cover models with an extended gauge. We also work out the phenomenology of one concrete 2-loop model in which both, mass mechanism and short-range diagram, might lead to competitive contributions, in some detail.

引用

页数：40

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