Neutral minima in two-Higgs doublet models

We explore the scenario in which the breaking of the electroweak symmetry is due to the simultaneous presence and interplay of a dynamical sector and an unnatural elementary Higgs. We introduce a low energy effective Lagrangian and constrain the various couplings via direct search limits and electroweak and flavor precision tests. We find that the model we study is a viable model of dynamical breaking of the electroweak symmetry.

Section: Parameter Scan Methodsmentioning

confidence: 90%

Unnatural origin of fermion masses for technicolor

Antola

Heikinheimo

Sannino

et al. 2010

“…Another feature that a more involved scalar potential encompasses is the possibility of different symmetry breaking patterns and the 2HDM is no exception [34][35][36][37][38][39][40]. With additional Higgs doublets, this complexity increases substantially [41][42][43][44].…”

Section: Jhep11(2017)106mentioning

confidence: 99%

One-loop considerations for coexisting vacua in the CP conserving 2HDM

Cherchiglia¹,

Nishi²

2017

The Two-Higgs-Doublet model (2HDM) is a simple and viable extension of the Standard Model with a scalar potential complex enough that two minima may coexist. In this work we investigate if the procedure to identify our vacuum as the global minimum by tree-level formulas carries over to the one-loop corrected potential. In the CP conserving case, we identify two distinct types of coexisting minima -the regular ones (moderate tan β) and the non-regular ones (small or large tan β) -and conclude that the tree level expectation fails only for the non-regular type of coexisting minima. For the regular type, the sign of m 2 12 already precisely indicates which minima is the global one, even at one-loop.

“…While positivity may be satisfied for the given parameters of the potential, the considered minimum need not be the global one. However, it has been shown that, if a local charge-conserving minimum exists, then there can be no charge-breaking minimum [40][41][42]. Nevertheless, the potential of the 2HDM can have more than one charge-conserving minimum.…”

Section: Theoretical Constraintsmentioning

confidence: 99%

Probing the charged Higgs boson at the LHC in the CP-violating type-II 2HDM

Basso

Lipniacka

Mahmoudi

et al. 2012

We present a phenomenological study of a CP-violating two-Higgs-doublet Model with type-II Yukawa couplings at the Large Hadron Collider (LHC). In the light of recent LHC data, we focus on the parameter space that survives the current and past experimental constraints as well as theoretical bounds on the model. Once the phenomenological scenario is set, we analyse the scope of the LHC in exploring this model through the discovery of a charged Higgs boson produced in association with a W boson, with the former decaying into the lightest neutral Higgs and a second W state, altogether yielding a bbW + W − signature, of which we exploit the W + W − semileptonic decays.