scholarly journals The Higgs potential in 2HDM extended with a real triplet scalar: A roadmap

2021 ◽  
pp. 2150131
Author(s):  
B. Ait-Ouazghour ◽  
M. Chabab
Keyword(s):  
Decay Channel ◽  
Higgs Doublet ◽  
Higgs Potential ◽  
Mixing Angle ◽  
Decay Modes ◽  
Higgs Decay ◽  
Clear Insight ◽  
Doublet Model ◽  
Two Higgs Doublet Model ◽  
Comprehensive Study

We perform a comprehensive study of the Higgs potential of the two Higgs doublet model extended by a real triplet scalar field [Formula: see text]. This model, dubbed [Formula: see text], has a rich Higgs spectrum consisting of three CP-even Higgs [Formula: see text], one CP-odd [Formula: see text] and two pairs of charged Higgs [Formula: see text]. First, we determine the perturbative unitarity constraints and a set of nontrivial conditions for the boundedness from below (BFB). Then we derive the Veltman conditions by considering the quadratic divergencies of Higgs boson self-energies in [Formula: see text]. We find that the parameter space is severely delimited by these theoretical constraints, as well as experimental exclusion limits and Higgs signal rate measurements at LEP and LHC. Using HiggsBounds-5.3.2beta and HiggSignals-2.2.3beta public codes, an exclusion test at [Formula: see text] is then performed on the physical scalars of [Formula: see text]. Our analysis provides a clear insight on the nonstandard scalar masses, showing that the allowed ranges are strongly sensitive to the sign of mixing angle [Formula: see text], essentially when naturalness is involved. For [Formula: see text] scenario, our results place higher limits on the bounds of all scalar masses, and show that the pairs [Formula: see text] and [Formula: see text] are nearly mass degenerate varying within the intervals [Formula: see text] GeV and [Formula: see text] GeV, respectively. When [Formula: see text] turns positive, we show that consistency with theoretical constraints and current LHC data, essentially on the diphoton decay channel, favors Higgs masses varying within wide allowed ranges: [Formula: see text] GeV for [Formula: see text]; [Formula: see text] GeV for ([Formula: see text], [Formula: see text]) and [Formula: see text] GeV for ([Formula: see text], [Formula: see text]). Finally, we find that the [Formula: see text] and [Formula: see text] Higgs decay modes are generally correlated if [Formula: see text] lies within the reduced intervals [Formula: see text] and [Formula: see text] parameter is frozen around [Formula: see text] ([Formula: see text]) for [Formula: see text] ([Formula: see text]).

scholarly journals SIGNATURES OF NEW PHYSICS IN DILEPTONIC B-DECAYS

2006 ◽  
Vol 21 (12) ◽  
pp. 2617-2634 ◽  
Author(s):  
S. RAI CHOUDHURY ◽  
A. S. CORNELL ◽  
NAVEEN GAUR ◽  
G. C. JOSHI
Keyword(s):  
B Mesons ◽  
B Meson ◽  
Higgs Doublet ◽  
New Physics ◽  
Final State ◽  
Decay Modes ◽  
Leptonic Decays ◽  
The Standard Model ◽  
Doublet Model ◽  
Two Higgs Doublet Model

Leptonic decays of B-mesons are theoretically very clean probes for testing the Standard Model (SM) and possible physics beyond it. Amongst the various leptonic decays of the B-meson, the pure dileptonic decay B → ℓ+ ℓ- is very important, as this mode is helicity suppressed in the SM but can be substantially enhanced in some of the models beyond the SM, such as supersymmetric (SUSY) theories and the two Higgs doublet model (2HDM). Although the purely dileptonic decay mode is helicity suppressed in the SM its associated mode B → ℓ+ ℓ-γ does not have the same suppression, due to the presence of γ in the final state. In this paper we will also analyze the effects of enhanced Z-penguins on these two decay modes.

scholarly journals The LHC searches for heavy neutral Higgs bosons by jet substructure analysis

2016 ◽  
Vol 31 (33) ◽  
pp. 1644009 ◽  
Author(s):  
Ning Chen
Keyword(s):  
Top Quarks ◽  
Higgs Doublet ◽  
Higgs Bosons ◽  
Jet Substructure ◽  
High Luminosity ◽  
Decay Modes ◽  
Substructure Analysis ◽  
Doublet Model ◽  
Two Higgs Doublet Model ◽  
Search Modes

The two-Higgs-doublet model contains extra Higgs bosons with mass ranges spanning from several hundred GeV to about 1 TeV. We study the possible experimental searches for the neutral Higgs bosons of [Formula: see text] and [Formula: see text] at the future high-luminosity LHC runs. Besides of the conventional search modes that are inspired by the supersymmetric models, we discuss two search modes which were not quite addressed previously. They are the decay modes of [Formula: see text] and [Formula: see text]. Thanks to the technique of tagging boosted objects of SM-like Higgs bosons and top quarks, we show the improved mass reaches for heavy neutral Higgs bosons with masses up to [Formula: see text]. The modes proposed here are complementary to the conventional experimental searches motivated by the MSSM.

scholarly journals Observability of triple or double charged Higgs production in two Higgs doublet model type II at an e+e- linear collider

2015 ◽  
Vol 30 (04n05) ◽  
pp. 1550022 ◽  
Author(s):  
M. Hashemi ◽  
I. Ahmed
Keyword(s):  
Higgs Mass ◽  
Linear Collider ◽  
Higgs Doublet ◽  
Type Ii ◽  
Higgs Decay ◽  
Charged Higgs ◽  
Signal Significance ◽  
Doublet Model ◽  
Two Higgs Doublet Model ◽  
Higgs Signal

In this paper the charged Higgs signal through triple or double Higgs production in a two Higgs doublet model (2HDM) type II is studied. The main production process is e+e- →H+H-H0 followed by the charged Higgs decay to a pair of τν and the neutral Higgs decay to [Formula: see text]. The alternative process H+W-H0 is also included as a source of charged Higgs signal in the analysis. The focus is on a future e+e- linear collider operating at [Formula: see text]. The final state under consideration [Formula: see text] is suitable for electroweak background rejection using the b-tagging tools. It is shown that although the signal cross-section is small, with a reasonable background suppression, high signal significance values are achievable at an integrated luminosity 500 fb-1 depending on the charged Higgs mass, tan β and the CP-odd neutral Higgs mass. Finally results are quoted in terms of the signal significance for charged Higgs in the mass range 160 < mH± < 400 GeV .

scholarly journals Probing heavy charged Higgs bosons through bottom flavored hadrons in the $$H^+\rightarrow \bar{b}t\rightarrow B+X$$ channel in 2HDM

2021 ◽  
Vol 81 (4) ◽  
Author(s):  
S. Mohammad Moosavi Nejad ◽  
Pegah Sartipi Yarahmadi
Keyword(s):  
Top Quark ◽  
Hadron Collider ◽  
Higgs Doublet ◽  
Higgs Bosons ◽  
Beyond The Standard Model ◽  
Higgs Decay ◽  
Charged Higgs ◽  
Doublet Model ◽  
Charged Higgs Bosons ◽  
Two Higgs Doublet Model

AbstractObserving light or heavy charged Higgs bosons $$H^\pm $$ H ± , lighter or heavier than the top quark, would be instant evidence of physics beyond the Standard Model. For this reason, in recent years searches for charged Higgs bosons have been in the center of attention of current colliders such as the CERN Large Hadron Collider (LHC). In spite of all efforts, no signal has been yet observed. Especially, the results of CMS and ATLAS experiments have excluded a large region in the MSSM $$m_{H^+}-\tan \beta $$ m H + - tan β parameter space for $$m_{H^+}=80{-}160$$ m H + = 80 - 160  GeV corresponding to the entire range of $$\tan \beta $$ tan β up to 60. Therefore, it seems that one should concentrate on probing heavy charged Higgs bosons ($$m_{H^\pm }>m_t$$ m H ± > m t ) so in this context each new probing channel is welcomed. In this work, we intend to present our proposed channel to search for heavy charged Higgses through the study of scaled-energy distribution of bottom-flavored mesons (B) inclusively produced in charged Higgs decay, i.e., $$H^+\rightarrow t\bar{b}\rightarrow B+X$$ H + → t b ¯ → B + X . Our study is carried out within the framework of the generic two Higgs doublet model (2HDM) using the massless scheme where the zero mass parton approximation is adopted for bottom quark.

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