https://doi.org/10.1140/epjp/s13360-022-03496-8
Regular Article
Weak dipole moments of the top-quark at the Bestest Little Higgs model
Facultad de Física, Universidad Autónoma de Zacatecas, Apartado Postal C-580, 98060, Zacatecas, Mexico
Received:
4
July
2022
Accepted:
14
November
2022
Published online:
1
December
2022
We present a new search for the sensitivity limits on the weak dipole moments of the top-quark-Z boson interactions in the context of the Bestest Little Higgs Model (BLHM). For this purpose, we derive the corresponding Feynman rules. Among the new contributions, there are those arising from the vertices of scalar bosons, vector bosons and heavy quarks contribution: 
, (
); 
, (
); and 
(
). With these new vertices, we calculate the one-loop contributions to the weak dipole moments 
and 
of the top-quark in several scenarios. We found that with the parameters of the BLHM of 
GeV, 
GeV, 
GeV, ![$$f=[1000, 3000]$$](/articles/epjplus/abs/2022/12/13360_2022_Article_3496/13360_2022_Article_3496_tex_eq12.png)
GeV and 
, the reaches values with a sensitivity of 
, 
, where the main contribution comes from the scalars 
and 
, which couples with the top-quark of the Standard Model and the top-quarks of the BLHM. These values seem to be out of the reach of the expected experimental sensitivity of present experiments. However, experiments on future colliders are expected to be sensitive enough to measure the anomalous weak magnetic dipole moment of the top-quark. Our study complements other studies at the one-loop level with an extended scalar sector.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
