Spontaneous CP-violation in the simplest little Higgs model and its future collider tests: The scalar sector

We propose spontaneous CP violation in the simplest little Higgs model. In this model, the pseudoscalar field can acquire a nonzero vacuum expectation value. This leads to a mixing between the two scalars with different CP charge, which means that spontaneous CP violation occurs. It is also a connec...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. D 2018-04, Vol.97 (7), p.075031
Main Author: Mao, Ying-nan
Format: Article
Language:English
Subjects:
Constraint modelling
CP violation
Matter & antimatter
Scalars
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We propose spontaneous CP violation in the simplest little Higgs model. In this model, the pseudoscalar field can acquire a nonzero vacuum expectation value. This leads to a mixing between the two scalars with different CP charge, which means that spontaneous CP violation occurs. It is also a connection between the composite Higgs mechanism and CP violation. Facing the experimental constraints, the model is still viable for both scenarios in which the extra scalar appears below or around the electroweak scale. We also discuss the future collider tests of CP violation in the scalar sector through measuring h2ZZ and h1h2Z′ vertices (see the definitions of the particles in the text), which provide new motivations for future e+e− and pp colliders. This also shows the importance of the vector-vector-scalar- and vector-scalar-scalar-type vertices in discovering CP-violation effects in the scalar sector.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.97.075031