SEARCH FOR CHARGED HIGGS BOSONS AT SSC

1987 ◽  
Vol 02 (04) ◽  
pp. 1055-1067 ◽  
Author(s):  
Hans-Uno Bengtsson ◽  
Hiroaki Yamamoto ◽  
Sachio Komamiya
Keyword(s):  
Decay Mode ◽  
Top Quark ◽  
Vacuum Expectation ◽  
Higgs Doublet ◽  
Higgs Bosons ◽  
Quark Interaction ◽  
Charged Higgs ◽  
Charged Higgs Bosons ◽  
Two Higgs Doublet Models ◽  
Very High

We examine the possibility of finding charged Higgs bosons (H±) at the SSC. The charged Higgs boson is produced with a top quark via a gluon+bottom quark interaction (g+b→H+t). For the two Higgs doublet models, H± decays predominantly into t+b. Since the background from QCD processes will be very severe for this decay mode, we studied the H±→τ+ν decay mode. Even for this mode, background from the processes pp→W+t+spectators→ℓ+νℓ+t+spectators will be very high. In the two Higgs doublet models, it is very difficult to extract the charged Higgs signal for reasonable values of the ratio of the two vacuum expectation values ( tan β=v1/v2).

scholarly journals Light charged Higgs boson scenario in 3-Higgs doublet models

2017 ◽  
Vol 32 (23n24) ◽  
pp. 1750145 ◽  
Author(s):  
A. G. Akeroyd ◽  
Stefano Moretti ◽  
Kei Yagyu ◽  
Emine Yildirim
Keyword(s):  
Higgs Boson ◽  
Top Quark ◽  
Vacuum Expectation ◽  
Higgs Doublet ◽  
Charged Higgs Boson ◽  
Higgs Bosons ◽  
Tree Level ◽  
Yukawa Couplings ◽  
Charged Higgs ◽  
Charged Higgs Bosons

The constraints from the measurements of the [Formula: see text] decay rate on the parameter space of 3-Higgs Doublet Models (3HDMs), where all the doublets have nonzero vacuum expectation values, are studied at the next-to-leading order in QCD. In order to naturally avoid the presence of flavour changing neutral currents at the tree level, we impose two softly-broken discrete [Formula: see text] symmetries. This gives rise to five independent types of 3HDMs that differ in their Yukawa couplings. We show that in all these 3HDMs (including the case of type-II-like Yukawa interactions) both masses of the two charged Higgs bosons [Formula: see text] and [Formula: see text] can be smaller than the top mass [Formula: see text] while complying with the constraints from [Formula: see text]. As an interesting phenomenological consequence, the branching ratios of the charged Higgs bosons decay into the [Formula: see text] final states can be as large as [Formula: see text] when their masses are taken to be below [Formula: see text] in two of the five 3HDMs (named as Type-Y and Type-Z). This light charged Higgs boson scenario provides a hallmark 3HDM signature that cannot be realised in [Formula: see text] symmetric 2-Higgs doublet models. We find that in the Type-Y and Type-Z 3HDMs the scenario with [Formula: see text], [Formula: see text] is ruled out by the direct searches at the LHC, but in the Type-Y 3HDM [Formula: see text] and [Formula: see text] is allowed by [Formula: see text] and direct searches at LEP2, Tevatron and LHC due to the reduced sensitivity of these searches to the degenerate case [Formula: see text]. The cases where only one or both charged Higgs bosons are above the top quark mass are also naturally allowed in the both Type-Y and Type-Z 3HDMs.

scholarly journals Charged Higgs bosons in naturally aligned two-Higgs-doublet models at the LHC

2019 ◽  
Vol 100 (3) ◽  
Author(s):  
Emily Hanson ◽  
William Klemm ◽  
Roger Naranjo ◽  
Yvonne Peters ◽  
Apostolos Pilaftsis
Keyword(s):  
Higgs Doublet ◽  
Higgs Bosons ◽  
Charged Higgs ◽  
Charged Higgs Bosons ◽  
Two Higgs Doublet Models

scholarly journals Light charged Higgs bosons at the LHC in two-Higgs-doublet models

2011 ◽  
Vol 84 (5) ◽  
Author(s):  
Mayumi Aoki ◽  
Renato Guedes ◽  
Shinya Kanemura ◽  
Stefano Moretti ◽  
Rui Santos ◽  
...  
Keyword(s):  
Higgs Doublet ◽  
Higgs Bosons ◽  
Charged Higgs ◽  
Charged Higgs Bosons ◽  
Two Higgs Doublet Models

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.

Search for Charged Higgs Bosons in Top Quark Pair Decays at D0

1999 ◽  
Author(s):  
Eric Hartel Smith
Keyword(s):  
Top Quark ◽  
Higgs Bosons ◽  
Charged Higgs ◽  
Charged Higgs Bosons

scholarly journals The forgotten channels: charged Higgs boson decays to a W± and a non-SM-like Higgs boson

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Henning Bahl ◽  
Tim Stefaniak ◽  
Jonas Wittbrodt
Keyword(s):  
Higgs Boson ◽  
Higgs Sector ◽  
Higgs Doublet ◽  
Charged Higgs Boson ◽  
Higgs Bosons ◽  
Type I ◽  
Collider Phenomenology ◽  
Charged Higgs ◽  
Charged Higgs Bosons ◽  
Almost All

Abstract The presence of charged Higgs bosons is a generic prediction of multiplet extensions of the Standard Model (SM) Higgs sector. Focusing on the Two-Higgs-Doublet-Model (2HDM) with type I and lepton-specific Yukawa sectors, we discuss the charged Higgs boson collider phenomenology in the theoretically and experimentally viable parameter space. While almost all existing experimental searches at the LHC target the fermionic decays of charged Higgs bosons, we point out that the bosonic decay channels — especially the decay into a non-SM-like Higgs boson and a W boson — often dominate over the fermionic channels. Moreover, we revisit two genuine BSM effects on the properties of the discovered Higgs boson — the charged Higgs contribution to the diphoton rate and the Higgs decay to two light Higgs bosons — and their implication for the charged Higgs boson phenomenology. As main result of the present paper, we propose five two-dimensional benchmark scenarios with distinct phenomenological features in order to facilitate the design of dedicated LHC searches for charged Higgs bosons decaying into a W boson and a light, non-SM-like Higgs boson.

scholarly journals Top quark polarization as a probe of charged Higgs bosons

2018 ◽  
Vol 98 (11) ◽  
Author(s):  
Abdesslam Arhrib ◽  
Adil Jueid ◽  
Stefano Moretti
Keyword(s):  
Top Quark ◽  
Higgs Bosons ◽  
Charged Higgs ◽  
Charged Higgs Bosons

scholarly journals Searching for heavy charged Higgs bosons through top quark polarization

2020 ◽  
Vol 35 (15n16) ◽  
pp. 2041011 ◽  
Author(s):  
Abdesslam Arhrib ◽  
Adil Jueid ◽  
Stefano Moretti
Keyword(s):  
Higgs Boson ◽  
Top Quark ◽  
Hadron Collider ◽  
Underlying Mechanism ◽  
Charged Higgs Boson ◽  
Higgs Bosons ◽  
Type I ◽  
Chiral Structure ◽  
Charged Higgs ◽  
Charged Higgs Bosons

We study the production of a heavy charged Higgs boson at the Large Hadron Collider (LHC) in [Formula: see text] within a 2-Higgs Doublet Model (2HDM). The chiral structure of the [Formula: see text] coupling can trigger a particular spin state of the top quark produced in the decay of a charged Higgs boson and, therefore, is sensitive to the underlying mechanism of the Electroweak Symmetry Breaking (EWSB). Taking two benchmark models (2HDM type-I and 2HDM type-Y) as an example, we show that inclusive rates, differential distributions and forward–backward asymmetries of the top quark’s decay products can be used to search for heavy charged Higgs bosons and also as model discriminators.

SEARCH FOR CHARGED HIGGS BOSONS IN DECAYS OF PAIR-PRODUCED TOP QUARKS AT DØ

2001 ◽  
Vol 16 (supp01a) ◽  
pp. 395-398
Author(s):  
◽  
PHILLIP GUTIERREZ
Keyword(s):  
Standard Model ◽  
Top Quark ◽  
Top Quarks ◽  
Higgs Bosons ◽  
Full Data ◽  
The Standard Model ◽  
Charged Higgs ◽  
Charged Higgs Bosons

We present a search for t → bH+ in [Formula: see text] candidate events at DØ based on two methods. The first seeks a deficit in signal relative to expectations from the standard model (SM). Such a deficit would imply the presence of a non-SM decay of the top quark. This search involves the full data sample of ≈ 110 pb -1 of [Formula: see text] collisions at [Formula: see text], collected with the DØ detector. The second method looks for charged Higgs decays to τ leptons (and associated neutrinos), and is based on a 62 pb -1 subset of the aforementioned data sample.

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