Phenomenology of SUSY SU(5) GUT with neutrinophilic Higgs

TL;DR

This paper explores a SUSY SU(5) GUT model with neutrinophilic Higgs that naturally explains the relation between the TeV-scale, neutrino mass, and GUT scale, achieving gauge unification and analyzing flavor processes.

Contribution

It introduces a SUSY SU(5) GUT model with neutrinophilic Higgs that dynamically realizes the scale relation and maintains gauge coupling unification with proton stability.

Findings

Gauge coupling unification is achieved.

The model explains the relation M_NP ≈ √(m_ν M_GUT).

Flavor changing processes are evaluated.

Abstract

Among three typical energy scales, a neutrino mass scale ($m_\nu\sim$ 0.1 eV), a GUT scale ($M_{GUT}\sim 10^{16}$ GeV), and a TeV-scale ($M_{NP}\sim$ 1 TeV), there is a fascinating relation of $M_{NP}\simeq \sqrt{m_\nu\cdot M_{GUT}}$.The TeV-scale, $M_{NP}$, is a new physics scale beyond the standard model which is regarded as "supersymmetry" (SUSY) in this letter. We investigate phenomenology of SUSY SU(5) GUT with neutrinophilic Higgs, which realizes the above relation dynamically as well as the suitable magnitude of Dirac mass, $m_\nu$, through a tiny vacuum expectation value of neutrinophilic Higgs. As a remarkable feature of this model, accurate gauge coupling unification can be achieved as keeping with a proton stability. We also evaluate flavor changing processes in quark/lepton sectors.