Anomalous magnetic and weak magnetic dipole moments of the τ lepton in the simplest little Higgs model

We obtain analytical expressions, both in terms of parametric integrals and Passarino–Veltman scalar functions, for the one-loop contributions to the anomalous weak magnetic dipole moment (AWMDM) of a charged lepton in the framework of the simplest little Higgs model (SLHM). Our results are general...

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Bibliographic Details
Published inThe European physical journal. C, Particles and fields Vol. 77; no. 4; pp. 1 - 19
Main Authors Arroyo-Ureña, M. A., Hernández-Tomé, G., Tavares-Velasco, G.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.04.2017
Springer Nature B.V
Subjects
Astronomy
Astrophysics and Cosmology
Charged particles
Dipole moments
Elementary Particles
Hadrons
Heavy Ions
Magnetic dipoles
Magnetism
Mathematical models
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Parameter sensitivity
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Regular Article - Theoretical Physics
Sensitivity
String Theory
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Summary:We obtain analytical expressions, both in terms of parametric integrals and Passarino–Veltman scalar functions, for the one-loop contributions to the anomalous weak magnetic dipole moment (AWMDM) of a charged lepton in the framework of the simplest little Higgs model (SLHM). Our results are general and can be useful to compute the weak properties of a charged lepton in other extensions of the standard model (SM). As a by-product we obtain generic contributions to the anomalous magnetic dipole moment (AMDM), which agree with previous results. We then study numerically the potential contributions from this model to the τ lepton AMDM and AWMDM for values of the parameter space consistent with current experimental data. It is found that they depend mainly on the energy scale f at which the global symmetry is broken and the t β parameter, whereas there is little sensitivity to a mild change in the values of other parameters of the model. While the τ AMDM is of the order of 10 - 9 , the real (imaginary) part of its AWMDM is of the order of 10 - 9 ( 10 - 10 ). These values seem to be out of the reach of the expected experimental sensitivity of future experiments.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-017-4803-z