Mono-Higgs signature in a fermionic dark matter model

Ghorbani, Karim; Khalkhali, Leila

doi:10.1088/1361-6471/aa823a

Cited by 22 publications

(12 citation statements)

References 84 publications

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“…TeV. This signature is an excellent probe of new physics and DM [61][62][63][64]. We stress out that searches of DM in events with Higgs and missing transverse energy have been carried out by the ATLAS and the CMS collaborations [65][66][67][68][69][70][71] using τ + τ − , γγ and bb decay channels of the Higgs boson.…”

Section: Introductionmentioning

confidence: 99%

Mono-Higgs signature in the scotogenic model with Majorana dark matter

et al. 2020

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We study the phenomenology of scotogenic model in the case of Majorana Dark Matter (DM) candidate.This scenario gives important consequences since the parameter space of the model is almost unconstrained compared to the Inert Higgs Doublet Model (or the scotogenic model with scalar DM), and hence, offers new opportunities for discovery at future high energy collider, e.g. the HL-LHC. As an example, we focus on the production of the Standard Model (SM) Higgs boson in association with a pair of dark scalars. Owing to its clean signature, the γγ decay channel of the SM Higgs boson is investigated in great detail at both the HL-LHC (at √ s = 14 TeV) and the future FCC-hh (at √ s = 100 TeV). After revisiting the LHC constraints from run-II on the parameter space of the model, and selecting benchmark points satisfying all the theoretical and experimental constraints, we found that scalars with mass up to 140 GeV (160 GeV) can be probed at the LHC (FCC-hh) with a 3 ab −1 of integrated luminosity assuming 5% of uncertainty.contains one CP-even Higgs identified as the SM Higgs, an other CP-even Higgs H 0 , one CP-odd A 0 and a pair of charged Higgs H ± , and consequently has a rich phenomenology [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48]. For example, the model provides mono-jet, mono-Higgs, mono-Z, mono-photon signatures that can be tested at the LHC and future colliders. It appears from the above phenomenological studies that the IHDM is strongly constrained from direct and indirect DM searches both for low and intermediate DM masses [39,49]. For DM lighter than 62.5 GeV, LHC data also puts severe constraints on the invisible decay of the SM Higgs which in turn translate into constraints on a combination of the scalar parameters of the potential [39,50]. Moreover, collider bounds on the IHDM are obtained as a reinterpretation of neutralinos and charginos pair production both from LEP II [51] and from LHC [52]. From LEP II data, Ref.[51] sets an upper bound on the pseudo-scalar mass, m A 0 (resp m H 0 ) , below 100 GeV (resp 80 GeV) consistent with mass splittings ∆m(A 0 , H 0 ) ≥ 8 GeV. While from LHC data, Ref [52] limits have been derived using a dilepton plus missing energy signature which excludes masses for the exotic scalar up to 62.5 GeV. A recent study [50] showed that the LHC at 13 TeV and 3000 fb −1 luminosity could exclude exotic scalar masses below 83 GeV using the mono-jet channel.However, If one focuses on a degenerate spectrum of exotic scalars, which is a natural outcome of accidental symmetries in the scalar potential [53], the region of scalar masses above M Z /2 remains unconstrained for splittings between the exotic scalar and the charged scalar mass below 5 GeV. It was also found that LHC searches are not strong enough to probe the degenerate window due to lepton p T requirements. In the light of current collider experimental bounds and the viable region of parameter space in the IHDM, and in order to address the DM nature, one has to go beyond this minimal exte...

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Section: Introductionmentioning

confidence: 99%

Mono-Higgs signature in the scotogenic model with Majorana dark matter

et al. 2020

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“…For DM masses in the range m dm < m h /2, one can impose constraint on the parameters g d , θ and m dm from invisible Higgs decay measurements with Br(h → invisible) 0.24 [19]. Given the invisible Higgs decay process, h →ψψ, we find for small mixing angle the condition g d sin θ 0.16 GeV 1/2 /(m 2 h − 4m 2 dm ) 1/4 [20]. We compute DM relic density numerically over the model parameter space by applying the program micrOMEGAs [21].…”

Section: The Pseudoscalar Modelmentioning

confidence: 94%

Leading loop effects in pseudoscalar-Higgs portal dark matter

Ghorbani

2019

J. High Energ. Phys.

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We examine a model with a fermionic dark matter candidate having pseudoscalar interaction with the standard model particles where its direct detection elastic scattering cross section at tree level is highly suppressed. We then calculate analytically the leading loop contribution to the spin independent scattering cross section. It turns out that these loop effects are sizable over a large region of the parameter space. Taking constraints from direct detection experiments, the invisible Higgs decay measurements, observed DM relic density, we find viable regions which are within reach in the future direct detection experiments such as XENONnT.

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“…Simplified models for mono-X searches, where here X will be taken to be an object different from a jet, such as mono-Higgs [40][41][42][43], mono-W [44], -Z [6,45], and -b [46,47] have received comparatively less attention. Understandably, one does not expect DM to be produced copiously while radiating from the initial-state a particle such as Higgs, Z or W at the LHC.…”

Section: Jhep06(2017)082mentioning

confidence: 99%

Mono-X versus direct searches: simplified models for dark matter at the LHC

Liew

Papucci

Vichi

et al. 2017

J. High Energ. Phys.

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Abstract:We consider simplified models for dark matter (DM) at the LHC, focused on mono-Higgs, -Z or -b produced in the final state. Our primary purpose is to study the LHC reach of a relatively complete set of simplified models for these final states, while comparing the reach of the mono-X DM search against direct searches for the mediating particle. We find that direct searches for the mediating particle, whether in di-jets, jets+ / E T , multib+ / E T , or di-boson+ / E T , are usually stronger. We draw attention to the cases that the mono-X search is strongest, which include regions of parameter space in inelastic DM, two Higgs doublet, and squark mediated production models with a compressed spectrum.

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Mono-Higgs signature in a fermionic dark matter model

Cited by 22 publications

References 84 publications

Mono-Higgs signature in the scotogenic model with Majorana dark matter

Mono-Higgs signature in the scotogenic model with Majorana dark matter

Leading loop effects in pseudoscalar-Higgs portal dark matter

Mono-X versus direct searches: simplified models for dark matter at the LHC

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