Signals of leptophilic dark matter at the ILC

Dutta, S.; Rawat, Bharti; Sachdeva, Divya

doi:10.1140/epjc/s10052-017-5188-8

Cited by 28 publications

(24 citation statements)

References 89 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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“…The DM models can be tested at e + e − collider experiments. In particular, these experiments allow for the copious production of DM states associated with a Z boson, what is referred to as so called Higgsstrahlung process or mono-Z emission [19,20,[41][42][43][44][45], see figure 6. We assume that the energy of the Z boson can be reconstructed from data, therefore allowing for determination of the recoil mass ( Q 2 ), corresponding to the invariant mass of the dark particles.…”

Section: Jhep08(2020)052mentioning

confidence: 99%

Dark-matter-spin effects at future e+e− colliders

Grza̧dkowski

Iglicki

Mękała

et al. 2020

J. High Energ. Phys.

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We discuss the possibility to detect spin 0, 1 and 1 /2 dark matter (DM) at future e + e − colliders. The models considered here are simple, consistent and renormalizable field theories that provide correct DM abundance and satisfy direct detection, indirect detection and collider constraints. The intention of this paper was to verify to what extent it might be possible to disentangle models of different DM spins by the measurement of the cross section for e + e − → Z + • • • at future e + e − colliders. We specialize to the case of the ILC operating at √ s = 250 GeV, however our results apply as well for the FCC-ee and the CEPC colliders. For each model the cross section maximized with respect to parameters was calculated and compared to the expected 95% CL cross-section limits estimated for the ILC. It turned out that near the 2m DM m 1,2 resonances, where m 1 and m 2 are the SM Higgs boson and a non-standard Higgs boson masses, respectively, there exist substantial regions where the models are testable. A special attention has been payed to calculation of the cross section in the region where m 1 m 2 .

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“…Indeed, the diagrams shown in figure 1 can represent the dominant contribution for interactions with nucleons of a particular class of DM candidates, which have no tree-level couplings to quarks, but only to leptons. These leptophilic scenarios have been proposed to reduce the tension of the DM interpretation among different direct detection experiments [49][50][51][52][53][54][55][56], to solve some cosmic-ray anomalies [57][58][59][60][61][62][63][64][65][66][67][68][69], to explain the gamma-ray galactic center excess [70], to alleviate the tension in the measured muon magnetic moment [71][72][73], as potential signals in collider searches [74][75][76][77][78][79] or in gravitational wave detectors [77], as a way to capture DM in celestial objects [51,[80][81][82][83][84][85][86] and, within the context of sub-GeV DM, to discuss future strategies of direct detection [87][88]…”

Section: Introductionmentioning

confidence: 99%

Two-photon exchange in leptophilic dark matter scenarios

Garani

Gasparotto

Mastrolia

et al. 2021

J. High Energ. Phys.

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In leptophilic scenarios, dark matter interactions with nuclei, relevant for direct detection experiments and for the capture by celestial objects, could only occur via loop-induced processes. If the mediator is a scalar or pseudo-scalar particle, which only couples to leptons, the dominant contribution to dark matter-nucleus scattering would take place via two-photon exchange with a lepton triangle loop. The corresponding diagrams have been estimated in the literature under different approximations. Here, we present new analytical calculations for one-body two-loop and two-body one-loop interactions. The two-loop form factors are presented in closed analytical form in terms of generalized polylogarithms up to weight four. In both cases, we consider the exact dependence on all the involved scales, and study the dependence on the momentum transfer. We show that some previous approximations fail to correctly predict the scattering cross section by several orders of magnitude. Moreover, we quantitatively show that form factors in the range of momentum transfer relevant for local galactic dark matter, can be significantly smaller than their value at zero momentum transfer, which is the approach usually considered.

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Signals of leptophilic dark matter at the ILC

Cited by 28 publications

References 89 publications

Testing scalar versus vector dark matter

Testing scalar versus vector dark matter

Dark-matter-spin effects at future e+e− colliders

Two-photon exchange in leptophilic dark matter scenarios

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