Yuta Orikasa

Classically conformal

Abstract Under a hypothesis of classically conformal theories, we investigate the minimal B – L extended Standard Model, which naturally provides the seesaw mechanism for explaining tiny neutrino masses. In this setup, the radiative gauge symmetry breaking is successfully realized in a very simple way: The B – L gauge symmetry is broken through the conformal anomaly induced by quantum corrections in the Coleman–Weinberg potential. Associated with this B – L symmetry breaking, the Higgs mass parameter is dynamically generated, by which the electroweak symmetry breaking is triggered. We find that a wide range of parameter space can satisfy both the theoretical and experimental requirements.

B^-

In a previous paper [S. Iso, N. Okada, and Y. Orikasa, Phys. Lett. B 676, 81 (2009).], we have proposed the minimal B-L extended standard model as a phenomenologically viable model that realizes the Coleman-Weinberg-type breaking of the electroweak symmetry. Assuming the classical conformal invariance and stability up to the Planck scale, we will show in this paper that the model naturally predicts TeV scale B-L breaking as well as a light standard-model singlet Higgs boson and light right-handed neutrinos around the same energy scale. We also study phenomenology and detectability of the model at the Large Hadron Collider and the International Linear Collider.

L extended Standard Model

We explore the idea of accidental dark matter (aDM) stability in the scale invariant local

The minimal B-L model naturally realized at TeV scale

U(1)_{B-L}

Accidental dark matter: Case in the scale invariant local B-L model

model, which is a theory for neutrino and at the same time radiatively breaks scale invariance via quantum mechanical dynamics in the

LHC 750 GeV diphoton excess in a radiative seesaw model

U(1)_{B-L}

A Three-Loop Neutrino Model with Global

sector. A real singlet scalar can be accidental DM with an accidental

U(1)

Z_2

Symmetry

, by virtue of both extended symmetries. A

Three loop neutrino model with isolated

U(1)_{B-L}