Dark matter searches in the mono-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math>channel at high energy<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math>colliders

Yu, Zhao-Huan; Bi, Xiao-Jun; Yan, Qi-Shu; Yin, Peng-Fei

doi:10.1103/physrevd.90.055010

Cited by 18 publications

(20 citation statements)

References 85 publications

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“…An especially promising tool to probe the DM models discussed in this paper are future e + e − colliders [49]. In particular, they allow for the copious production of DM states associated with a Z boson, what is referred to as Higgsstrahlung process or mono-Z emision [31,[50][51][52][53][54][55] (see the diagram in Fig. 1).…”

Section: Higg-boson Invisable Decays: H 1 → XXmentioning

confidence: 99%

Testing scalar versus vector dark matter

et al. 2019

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We investigate and compare two simple models of dark matter (DM): a vector and a scalar DM model. Both models require the presence of two physical Higgs bosons h 1 and h 2 which come from mixed components of the standard Higgs doublet H and a complex singlet S. In the Vector model, the extra U (1) symmetry is spontaneously broken by the vacuum of the complex field S. This leads to a massive gauge boson X µ that is a DM candidate stabilized by the dark charge conjugation symmetry S → S * , X µ → −X µ . On the other hand, in the Scalar model the gauge group remains the standard one. The DM field A is the imaginary component of S and the stabilizing symmetry is also the dark charge conjugation S → S * (A → −A). In this case, in order to avoid spontaneous breaking, the U (1) symmetry is broken explicitly, but softly, in the scalar potential. The possibility to disentangle the two models has been investigated. We have analyzed collider, cosmological, DM direct and indirect detection constraints and shown that there are regions in the space spanned by the mass of the non-standard Higgs boson and the mass of the DM particle where the experimental bounds exclude one of the models. We have also considered possibility to disentangle the models at e + e − collider and concluded that the process e + e − → Z + DM provides a useful tool to distinguish the models.

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Section: Higg-boson Invisable Decays: H 1 → XXmentioning

confidence: 99%

Testing scalar versus vector dark matter

et al. 2019

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“…We compare our results for the unpolarized beams at √ s = 500 GeV and L = 500 fb −1 which are displayed in Figure 7 with Figures 4d and 4e of reference [56] corresponding to pseudo-scalar and axial-vector couplings respectively. We find that our analysis can provide a better kinematic reach ( m χ = 20 GeV ) for the pseudo-scalar coupling.…”

Section: χ 2 Analysismentioning

confidence: 99%

Signals of leptophilic dark matter at the ILC

2017

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Adopting a model independent approach, we constrain the various effective interactions of leptophilic DM particles with the visible world from the WMAP and Planck data. The thermally averaged indirect DM annihilation cross section and the DM-electron direct-detection cross section for such a DM candidate are observed to be consistent with the respective experimental data. We study the production of cosmologically allowed leptophilic DM in association with Z (Z → ff ), f ≡ q, e − , μ − at the ILC. We perform the χ 2 analysis and compute the 99% C.L. acceptance contours in the m χ and Λ plane from the two-dimensional differential distributions of various kinematic observables obtained after employing parton showering and hadronisation to the simulated data. We observe that the dominant hadronic channel provides the best kinematic reach of 2.62 TeV (m χ = 25 GeV), which further improves to ∼3 TeV for polarised beams at √ s = 1 TeV and an integrated luminosity of 1 ab −1 .

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“…[45], rare SM Z decays [46][47][48][49][50], light CP-odd Higgs bosons and supersymmetric models [51][52][53][54][55], . Recently, this topic has been addressed for some specific models [56][57][58][59][60]. LEP has also searched for exotic Z decays into light Higgs [61,62], two light Higgs in MSSM [63], photon and missing energy [64][65][66] and three photons [67].…”

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confidence: 99%

Exposing dark sector with futureZ-factories

Liu

Wang

et al. 2019

Int. J. Mod. Phys. A

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We investigate the prospects of searching dark sector models via exotic Z-boson decay at future e + e − colliders with Giga Z and Tera Z options. Four general categories of dark sector models: Higgs portal dark matter, vector portal dark matter, inelastic dark matter and axionlike particles, are considered. Focusing on channels motivated by the dark sector models, we carry out a model independent study of the sensitivities of Z-factories in probing exotic decays. The limits on branching ratios of the exotic Z decay are typically O(10 −6 −10 −8.5 ) for the Giga Z and O(10 −7.5 − 10 −11 ) for the Tera Z, and they are compared with the projection for the high luminosity LHC. We demonstrate that future Z-factories can provide its unique and leading sensitivity, and highlight the complementarity with other experiments, including the indirect and direct dark matter search limits, and the existing collider limits. Future Z factories will play a leading role to uncover the hidden sector of the universe in the future. *

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Dark matter searches in the mono-Zchannel at high energye+e−colliders

Cited by 18 publications

References 85 publications

Testing scalar versus vector dark matter

Testing scalar versus vector dark matter

Signals of leptophilic dark matter at the ILC

Exposing dark sector with futureZ-factories

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