Neutrinoless double beta decay process in left-right symmetric models without scalar bidoublet

作者：Patra Sudhanwa^*

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2013, 87(1): 015002.

DOI：10.1103/PhysRevD.87.015002

We present an alternative formulation of the left-right symmetric theory where the scalar sector consists of two Higgs doublets. This formulation differs from the standard version of the left-right model that makes use of L- and R- Higgs triplets and a Higgs bidoublet. The basic idea is to consider a few extra charged isosinglet fields; the fermion masses can be realized by integrating out these heavy isosinglet fields. We also give a detailed discussion on neutrinoless double beta decay in this particular left-right symmetric theory where the right-handed (RH) Majorana neutrino can be of MeV range. With this RH Majorana mass around the MeV scale, the contribution to neutrinoless double beta decay coming from the right-handed current can be comparable to the contributions coming from the standard left-handed sector only if the right-handed gauge boson mass is around 5 TeV. With this operative scale of W-R around a few TeV, it is possible to probe at the LHC. We have briefly commented on cosmological constraints from the big-bang nucleosynthesis and Universe cosmology on the RH neutrinos involved in this discussion. DOI: 10.1103/PhysRevD.87.015002

• 出版日期2013-1-2