Majorana neutrino decay in an Effective Approach

LUCIA DUARTE; JAVIER PERESSUTTI; OSCAR ALFREDO SAMPAYO

PHYSICAL REVIEW D

AMER PHYSICAL SOC

Lugar: New York; Año: 2015 vol. 92 p. 1 - 10

1550-7998

The search strategy or the discovery of new effects for heavy neutrinos often rely on their different decaychannels to detectable particles. In particular, in this work we study the decay of a Majorana neutrino withinteractions obtained from an effective general theory modeling new physics at the scale ¥Ë. The resultsobtained are general because they are based in an effective theory and not in specific models. We areinterested in relatively light-heavy Majorana neutrinos, with masses lower than the W mass (mN < mW).This mass range simplifies the study by reducing the possible decay modes. Moreover, we found that for¥Ë ¡­ 1 TeV, the neutrino plus photon channel could account for different observations: we analyze thepotentiality of the studied interactions to explain some neutrino-related problems like the MiniBooNE andSHALON anomalies. We show in different figures the dominant branching ratios and the decay length ofthe Majorana neutrino in this approach. These kinds of heavy neutral leptons could be searched for in theLHC with the use of displaced vertices techniques.