Testing Higgs portal dark matter via Z fusion at a linear collider

Kanemura, Shinya; Matsumoto, Shigeki; Nabeshima, Takehiro; Taniguchi, Hiroyuki

doi:10.1016/j.physletb.2011.06.040

Cited by 28 publications

(31 citation statements)

References 41 publications

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“…[103]) and assume a background expectation of 1.55 events. 15 It is then straight-forward to perform a combination of the different data sets by multiplying the individual likelihood functions.…”

Section: Appendix A: New Features In Ddcalcmentioning

confidence: 99%

“…We furthermore divide this signal region into two energy bins, which correspond to S1 ∈ [3 PE, 35 PE] and S1 ∈ [35 PE, 70 PE]. We estimate the expected backgrounds in the two bins to be 15 The expected number of background events is quoted as 1.8 ± 0.5. Assuming the uncertainty in this estimate to be Gaussian, the likelihood is maximized for a background expectation of 1.8 − 0.5 2 = 1.55 events.…”

Section: Appendix A: New Features In Ddcalcmentioning

confidence: 99%

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Global analyses of Higgs portal singlet dark matter models using GAMBIT

et al. 2019

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We present global analyses of effective Higgs portal dark matter models in the frequentist and Bayesian statistical frameworks. Complementing earlier studies of the scalar Higgs portal, we use GAMBIT to determine the preferred mass and coupling ranges for models with vector, Majorana and Dirac fermion dark matter. We also assess the relative plausibility of all four models using Bayesian model comparison. Our analysis includes up-to-date likelihood functions for the dark matter relic density, invisible Higgs decays, and direct and indirect searches for weakly-interacting dark matter including the latest XENON1T data. We also account for important uncertainties arising from the local density and velocity distribution of dark matter, nuclear matrix elements relevant to direct detection, and Standard Model masses and couplings. In all Higgs portal models, we find parameter regions that can explain all of dark matter and give a good fit to all data. The case of vector dark matter requires the most tuning and is therefore slightly disfavoured from a Bayesian point of view. In the case of fermionic dark matter, we find a strong preference for including a CP-violating phase that allows suppression of constraints from direct detection experiments, with odds in favour of CP violation of the order of 100:1. Finally, we present DDCalc 2.0.0, a tool for calculating direct detection observables and likelihoods for arbitrary non-relativistic effective operators.

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Section: Appendix A: New Features In Ddcalcmentioning

confidence: 99%

Section: Appendix A: New Features In Ddcalcmentioning

confidence: 99%

Global analyses of Higgs portal singlet dark matter models using GAMBIT

et al. 2019

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“…Along with the Higgs portal operator jHj 2 " c c (considered elsewhere [20]), the magnetic and electric dipole operators are the gauge-invariant dimension 5 operators coupling the DM to the SM and are thus among the most relevant operators mediating SM-DM interaction.…”

Section: Dark Matter With Dipole Momentsmentioning

confidence: 99%

Collider constraints on dipole-interacting dark matter

2012

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Dark matter which interacts through a magnetic or electric dipole moment is an interesting possibility which may help resolve the discrepancy between the DAMA annual modulation signal and the null results of other searches. In this article we examine relic density and collider constraints on such dark matter, and find that for couplings needed to explain DAMA, the thermal relic density is generically in the right ballpark to account for cosmological measurements. Collider constraints are relevant for light WIMPs, but less constraining that direct searches for masses above about 10 GeV.

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“…[39,40] for related studies), and in Ref. [41] for √ s = 1, 5 TeV, considering ZZ fusion production. 3 The sensitivity at the LHC and FCC-hh was thoroughly examined in Ref.…”

Section: Introductionmentioning

confidence: 99%

A global view of the off-shell Higgs portal

2020

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We study for the first time the collider reach on the derivative Higgs portal, the leading effective interaction that couples a pseudo Nambu-Goldstone boson (pNGB) scalar Dark Matter to the Standard Model. We focus on Dark Matter pair production through an off-shell Higgs boson, which is analyzed in the vector boson fusion channel. A variety of future high-energy lepton colliders as well as hadron colliders are considered, including CLIC, a muon collider, the High-Luminosity and High-Energy versions of the LHC, and FCC-hh. Implications on the parameter space of pNGB Dark Matter are discussed. In addition, we give improved and extended results for the collider reach on the marginal Higgs portal, under the assumption that the new scalars escape the detector, as motivated by a variety of beyond the Standard Model scenarios. *

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Testing Higgs portal dark matter via Z fusion at a linear collider

Cited by 28 publications

References 41 publications

Global analyses of Higgs portal singlet dark matter models using GAMBIT

Global analyses of Higgs portal singlet dark matter models using GAMBIT

Collider constraints on dipole-interacting dark matter

A global view of the off-shell Higgs portal

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