Some phenomenological aspects of a new $U(1)'$ model

TL;DR

This paper introduces a new non-universal $U(1)'$ extension of the standard model, analyzing its phenomenology, constraints from collider data, and implications for quark mass hierarchies with minimal fine tuning.

Contribution

It proposes a novel $U(1)'$ model with exotic particles, family-dependent couplings, and predictive mass relations consistent with experimental data.

Findings

Derived limits on $Z'$ mass and coupling from LHC data.

Predicted quark mass relations compatible with observations.

Hierarchies explained via heavy beyond standard model particles.

Abstract

We propose a new non-universal $U(1)'$ extension of the standard model with the addition of three exotic quark singlets, two scalar singlets and one additional scalar doublet. We obtain family dependent couplings with a new $Z'$ boson in the quark sector and universal couplings with the lepton sector. From experimental data on $Z'$ research at CERN-LHC collider, we find limit regions in the $U(1)'$ free parameters ($Z'$ mass and coupling constant), which we use to obtain total decay width and invariant-mass distributions. By introducing discrete symmetries and mixing couplings between ordinary and exotic fermions, we obtain predictable mass relations in the quark sector compatible with the phenomenological values without large fine tuning of the Yukawa couplings and with few free parameters, where hierarchies between quark families can be understood from the existence of heavy beyond standard model particles.