Phenomenology of large mixing for the $CP$-even neutral scalars of the Higgs triplet model

Phenomenology of large mixing for the $C P$ -even neutral scalars of the Higgs triplet model

A. G. Akeroyd and Cheng-Wei Chiang

Phys. Rev. D 81, 115007 – Published 22 June 2010

Abstract

The Higgs triplet model contains two $C P$ -even neutral scalar eigenstates, each having components from an isospin doublet and an isospin triplet scalar field. The mixing angle can be maximal if the masses of the scalar eigenstates are close to degeneracy. We quantify the dependence of the mixing angle on the mass splitting and on the vacuum expectation value of the neutral triplet scalar. We determine the parameter space for maximal mixing, and study the observability of both $C P$ -even Higgs bosons at the CERN LHC.

Received 23 March 2010

DOI:https://doi.org/10.1103/PhysRevD.81.115007

Authors & Affiliations

A. G. Akeroyd^*

Department of Physics and Center for Mathematics and Theoretical Physics, National Central University, Chungli, Taiwan 320

Cheng-Wei Chiang^†

Department of Physics and Center for Mathematics and Theoretical Physics, National Central University, Chungli, Taiwan 320
Institute of Physics, Academia Sinica, Taipei, Taiwan 115

^*akeroyd@ncu.edu.tw
^†chengwei@ncu.edu.tw

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Vol. 81, Iss. 11 — 1 June 2010

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Physical Review D

covering particles, fields, gravitation, and cosmology