Muon g-2 anomaly and μ–τ-philic Higgs doublet with a light CP-even component

We examine the possibilities of accommodating the muon g - 2 anomaly released by Fermilab in the 2HDM with a discrete Z 4 symmetry in which an inert Higgs doublet field ( H , A , H ± ) has the lepton flavor violation μ – τ interactions. We assume the Yukawa matrices to be real and symmetrical and in...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Vol. 81; no. 11
Main Authors: Wang, Hong-Xin, Wang, Lei, Zhang, Yang
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2021
Springer Nature B.V
Subjects:
Astronomy
Astrophysics and Cosmology
Confidence intervals
Elementary Particles
Flavor (particle physics)
Hadrons
Heavy Ions
Leptons
Mathematical analysis
Measurement Science and Instrumentation
Muons
Nuclear Energy
Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quarks
Regular Article - Theoretical Physics
String Theory
Symmetry
ISSN:1434-6044, 1434-6052
Online Access:Get full text
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Summary:We examine the possibilities of accommodating the muon g - 2 anomaly released by Fermilab in the 2HDM with a discrete Z 4 symmetry in which an inert Higgs doublet field ( H , A , H ± ) has the lepton flavor violation μ – τ interactions. We assume the Yukawa matrices to be real and symmetrical and investigate the case of light H (5 GeV < m H < 115 GeV). After imposing relevant theoretical and experimental constraints, especially for the multi-lepton searches at the LHC, we find that the muon g - 2 anomaly can be explained within 2 σ confidence level in the region of 5 GeV < m H < 20  GeV, 130 GeV < m A ( m H ± ) < 610 GeV, and 0.005 < ρ < 0.014. Meanwhile, the χ τ 2 fitting the data of lepton flavour universality in the τ decays approaches to the SM prediction.
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ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-021-09778-2