A μ-τ-philic scalar doublet under Zn flavor symmetry

Yoshihiko Abe, Takashi Toma, Koji Tsumura

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We propose a minimal model which accommodates the long-standing anomaly of muon magnetic moment based on abelian discrete flavor symmetries. The standard model is extended by scalar doublets charged under a Zn lepton flavor symmetry. In these models, a large contribution to the muon magnetic moment can be obtained by the chirality enhancement from new scalar mediated diagrams without conflicting with the flavor symmetry. Thanks to the lepton flavor symmetry, these models automatically forbid lepton flavor violation. The minimal model is based on Z4 symmetry with only one extra scalar doublet. In this model, we show that the parameter space favored by the muon g − 2 can easily be consistent with experimental constraints and theoretical bounds such as the electroweak precision tests, lepton universality, potential stability condition and triviality bound as well as the LHC direct search mass bound. The new contributions to the muon electric dipole moment and the Higgs decay into γγ can be indirect signals of the model.

Original languageEnglish
Article number142
JournalJournal of High Energy Physics
Volume2019
Issue number6
DOIs
Publication statusPublished - Jun 1 2019

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scalars
leptons
muons
symmetry
magnetic moments
electric moments
chirality
electric dipoles
dipole moments
diagrams
anomalies
augmentation
decay

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

A μ-τ-philic scalar doublet under Zn flavor symmetry. / Abe, Yoshihiko; Toma, Takashi; Tsumura, Koji.

In: Journal of High Energy Physics, Vol. 2019, No. 6, 142, 01.06.2019.

Research output: Contribution to journalArticle

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