Phenomenology of 2HDM with vectorlike quarks

Arhrib, Abdesslam; Benbrik, Rachid; King, Simon J. D.; Manaut, B.; Moretti, Stefano; Ün, Cem Salih

doi:10.1103/physrevd.97.095015

Cited by 27 publications

(37 citation statements)

References 75 publications

(86 reference statements)

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“…Because of B → X s γ constraints, the profile of a charged Higgs in the 2HDM Type-II and -Y is a rather heavy one, with a mass required to be more than 580 GeV. While this puts an obvious limit to LHC sensitivity owing to a large phase space suppression in production, we have emphasised that H ± → bbW ± channels should be searched for, with intermediate contributions from the AW ± and tb modes (including their interference [110]), alongside H ± → τ ν. In the case of the 2HDM Type-I and -X, a much lighter charged Higgs state is still allowed by data, in fact, even with a mass below that of the top quark.…”

Section: Discussionmentioning

confidence: 99%

A Guidebook to Hunting Charged Higgs Bosons at the LHC

Arhrib

Benbrik²,

Harouiz³

et al. 2020

Front. Phys.

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We perform a comprehensive global analysis in the Minimal Supersymmetric Standard Model (MSSM) as well as in the 2-Higgs Doublet Model (2HDM) of the production and decay mechanisms of charged Higgs bosons (H ± ) at the Large Hadron Collider (LHC). Starting from the most recent experimental results (SM-like Higgs boson signal strengths and search limits for new Higgs boson states obtained at Run-1 and -2 of the LHC and previous colliders), from (both direct and indirect) searches for Supersymmetric particles as well as from flavor observables (from both e + e − factories and hadron colliders) and upon enforcing theoretical constraints (vacuum stability, perturbativity, unitarity), we present precise predictions for H ± cross sections and decay rates in different reference scenarios of the two aforementioned models in terms of the parameter space currently available, specifically mapped over the customary (m A,H ± , tan β) planes, including singling out specific Benchmark Points (BPs) amenable to phenomenological investigation. These include the m mod+ h and hMSSM configurations of the MSSM and the 2HDM Type-I, -II, -X and -Y. Such BPs are always close to (or coinciding with) the best fits of the theoretical scenarios to experimental data. We also briefly discuss the ensuing phenomenology for the purpose of aiding future searches for such charged Higgs boson states. 1The Higgs boson discovery of 2012 [1,2,3,4] at the CERN Large Hadron Collider (LHC) has led to the confirmation of the Standard Model (SM) as the proper theory of the Electro-Weak (EW) scale. However, there is much evidence that the SM is not appropriate at all scales, rather it should be viewed as an effective low-energy realization of a more complete and fundamental theory onsetting beyond the EW regime. Among the many proposals for the latter, one can list theories with some new symmetry, e.g., Supersymmetry (SUSY), or an enlarged particle content (e.g., in the Higgs sector), or both. Following the aforementioned discovery, no new particle has however been seen at the LHC, implying that new physics at the EW scale should be weakly interacting or that strongly interacting particles, if present, should lead to signatures involving soft decay products or in channels with overwhelming (ir)reducible backgrounds. We shall adopt here the first assumption.Many SM extensions possess in their spectra additional neutral and/or charged Higgs states. Amongst these, SUSY [5] is indeed considered the most appealing one as it addresses several shortcomings of the SM, including the problem of the large hierarchy between the EW and Planck scales. While the search for SUSY was unsuccessful during the first LHC run, the increase in the Center-of-Mass (CM) energy of the machine from 8 TeV to 13 TeV plus the additional luminosity of the second run are improving greatly the sensitivity to the new superparticles which are predicted. While the jury is still on these, we remind here the reader that SUSY also requires at least two Higgs doublets for a successful EW Symmetry B...

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Section: Discussionmentioning

confidence: 99%

A Guidebook to Hunting Charged Higgs Bosons at the LHC

Arhrib

Benbrik²,

Harouiz³

et al. 2020

Front. Phys.

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“…3.3), it can depend on the CKM matrix at the GUT scale [596]. LFV contributions can also arise in SUSY models where R-parity is violated, explicitly or spontaneously, with interaction terms of the type l i l jνk that induce tree-level contributions to l → lll decays and µ → e conversion, as well as new dipole contributions to l → lγ [613][614][615][616][617].…”

Section: Lepton Flavour Violation and Dipole Momentsmentioning

confidence: 99%

GUT Physics in the Era of the LHC

et al. 2019

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Grand Unified Theories (GUTs) are one of the most interesting high-energy completions of the Standard Model, because they provide a rich, powerful and elegant group-theoretical framework able to resolve a variety of problems remaining in our current understanding of particle physics. They usually act as motivators for many low energy BSM theories, such as left-right symmetric or supersymmetric models, and they serve to fill the gap between the experimentally reachable low energies and the physics in the ultraviolet. In recent years, however, they have fallen slightly from the spotlight, in favour of "simplified" models with more specific phenomenological predictions. The aim of this review is to summarize the state of the art on GUTs and argue for their importance in modern physics. Recent advances in experiments permit to test the predictions of GUTs at different energy scales. First, as GUTs can play a role in the inflationary dynamics of the early Universe, their imprints could be found in the CMB observations by the Planck satellite. Remarkably enough, GUTs could manifest themselves also in terrestrial tests; several planned experiments aim to probe the proton stability and to establish order of magnitude higher bounds on its lifetime. Moreover, the predictions of specific GUT models could be tested even at the LHC thanks to its high energy reach, via searches for exotic states or additional contributions to flavour anomalies.

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“…is subject to interference effects with H ± → bt * → bbW ±( * ) and significant background from tt production and decay [32][33][34], we are induced to elect as tentative signal in our analysis the case of τ final states. Furthermore, in the bottom-left frame of Fig.1, we demonstrate that the bosonic decays of the charged Higgs boson, BR(H ± → h 0 /A 0 W ±( * ) ), could become the dominant ones, even reaching 100% in some cases (see also [16]).…”

Section: Signaturesmentioning

confidence: 99%

Identifying a light charged Higgs boson at the LHC Run II

et al. 2017

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We analyse the phenomenological implications of a light Higgs boson, $h$, within the CP-conserving 2-Higgs Doublet Model (2HDM) Type-I, for the detection prospects of the charged $H^\pm$ state at Run II of the Large Hadron Collider (LHC), assuming $\sqrt{s}=13$ TeV as energy and ${\cal O}(100~{\rm fb}^{-1})$ as luminosity. When sufficiently light, this $h$ state can open up the bosonic decay channel $H^\pm \to W^{\pm(*)}h$, which may have a branching ratio significantly exceeding those of the $H^\pm \to \tau\nu$ and $H^\pm \to cs$ channels. We perform a broad scan of the 2HDM Type-I parameter space, assuming the heavier of the two CP-even Higgs bosons, $H$, to be the observed SM-like state with a mass near 125 GeV. Through these scans we highlight regions in which $m_{H^\pm} < m_t +m_b$ that are still consistent with the most recent limits from experimental searches. We find in these regions that, when the $H^\pm \to W^{\pm(*)}h$ decay mode is the dominant one, the $h$ can be highly fermiophobic, with a considerably large decay rate in the $\gamma\gamma$ channel. This can result in the total cross section of the $\sigma(pp\to H^\pm h \to W^{\pm(*)} + 4\gamma)$ process reaching up to ${\cal O}(100~{\rm fb})$. We therefore investigate the possibility of observing this spectacular signal at the LHC Run II.Comment: 11 pages, 7 figure

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Phenomenology of 2HDM with vectorlike quarks

Cited by 27 publications

References 75 publications

A Guidebook to Hunting Charged Higgs Bosons at the LHC

A Guidebook to Hunting Charged Higgs Bosons at the LHC

GUT Physics in the Era of the LHC

Identifying a light charged Higgs boson at the LHC Run II

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