Make dark matter charged again

Agrawal, Prateek; Cyr-Racine, Francis-Yan; Randall, Lisa; Scholtz, Jakub

doi:10.1088/1475-7516/2017/05/022

Cited by 121 publications

(208 citation statements)

References 85 publications

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“…In addition, a preliminary investigation suggests that may be even further suppressed, due to the non-abelian nature of T DM ∈ SO (6). If the kinetic mixing is small enough -or altogether absent, -then DM charged under a dark U(1) has been shown to be broadly compatible with astrophysical observations [64][65][66][67]. In particular, the recent reappraisal of ref.…”

Section: Jhep11(2017)094mentioning

confidence: 98%

“…In particular, the recent reappraisal of ref. [67] suggested the viability of charged DM with weak scale mass and coupling to the dark photon of strength only moderately weaker than electromagnetism. In the light of the above considerations, the effects of gauging the U(1) DM on the DM phenomenology discussed in this paper are expected to be mild, because for weak-scale m χ the dominant interactions are set by larger couplings, especially the top Yukawa.…”

Section: Jhep11(2017)094mentioning

confidence: 99%

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Charged composite scalar dark matter

Balkin

Ruhdorfer

Salvioni

et al. 2017

J. High Energ. Phys.

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Abstract:We consider a composite model where both the Higgs and a complex scalar χ, which is the dark matter (DM) candidate, arise as light pseudo Nambu-Goldstone bosons (pNGBs) from a strongly coupled sector with TeV scale confinement. The global symmetry structure is SO(7)/SO(6), and the DM is charged under an exact U(1) DM ⊂ SO(6) that ensures its stability. Depending on whether the χ shift symmetry is respected or broken by the coupling of the top quark to the strong sector, the DM can be much lighter than the Higgs or have a weak-scale mass. Here we focus primarily on the latter possibility. We introduce the lowest-lying composite resonances and impose calculability of the scalar potential via generalized Weinberg sum rules. Compared to previous analyses of pNGB DM, the computation of the relic density is improved by fully accounting for the effects of the fermionic top partners. This plays a crucial role in relaxing the tension with the current DM direct detection constraints. The spectrum of resonances contains exotic top partners charged under the U(1) DM , whose LHC phenomenology is analyzed. We identify a region of parameters with f = 1.4 TeV and 200 GeV m χ 400 GeV that satisfies all existing bounds. This DM candidate will be tested by XENON1T in the near future.

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Section: Jhep11(2017)094mentioning

confidence: 98%

Section: Jhep11(2017)094mentioning

confidence: 99%

Charged composite scalar dark matter

Balkin

Ruhdorfer

Salvioni

et al. 2017

J. High Energ. Phys.

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“…They can also arise in the low-energy limit of models in which charge is quantized but there exists a kinetically mixed dark photon [1]. In addition, these particles could make up part of the dark matter in the universe [2][3][4][5][6][7][8][9][10].Millicharged particles can be produced at any intense fixed-target-produced beam via the decays of neutral mesons or direct Drell-Yan pair production arising from proton interactions in the target [11, 12] 1 . Produced mCPs are relativistic in the lab frame.…”

mentioning

confidence: 99%

Improved Limits on Millicharged Particles Using the ArgoNeuT Experiment at Fermilab

et al. 2020

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A search for millicharged particles, a simple extension of the standard model, has been performed with the ArgoNeuT detector exposed to the Neutrinos at the Main Injector beam at Fermilab. The ArgoNeuT Liquid Argon Time Projection Chamber detector enables a search for millicharged particles through the detection of visible electron recoils. We search for an event signature with two soft hits (MeV-scale energy depositions) aligned with the upstream target. For an exposure of the detector of 1.0 × 10 20 protons on target, one candidate event has been observed, compatible with the expected background. This search is sensitive to millicharged particles with charges between 10 −3 e and 10 −1 e and with masses in the range from 0.1 GeV to 3 GeV. This measurement provides leading constraints on millicharged particles in this large unexplored parameter space region.Millicharged particles (mCPs), i.e. particles (χ) with an electric charge Q χ = · e much smaller than the elementary charge ( 1), are a particularly simple, wellmotivated, extension of the standard model (SM). In their simplest form they are just new particles that violate the quantization of charge seen in the SM. They can also arise in the low-energy limit of models in which charge is quantized but there exists a kinetically mixed dark photon [1]. In addition, these particles could make up part of the dark matter in the universe [2][3][4][5][6][7][8][9][10].Millicharged particles can be produced at any intense fixed-target-produced beam via the decays of neutral mesons or direct Drell-Yan pair production arising from proton interactions in the target [11, 12] 1 . Produced mCPs are relativistic in the lab frame. For example, for a 120 GeV proton beam striking a target (as in the case of ArgoNeuT), the boost factors of the produced mCPs are in the range of 10-100. The opening angle of the mCP beam is large, of order 0.1 radians. Neutrino detectors located downstream of an intense proton beam striking 1 The bremsstrahlung contribution to mCP production is not included in this study, which may further enhance the sensitivity. a target, nominally used to produce the neutrino beam, may be exposed to a large flux of mCPs that were produced there. When traveling through matter, mCPs will lose energy by atomic excitation and ionization like any charged particle but with ionization and excitation rates reduced by 2 . Therefore, the mCP ionization track is undetectable except when knock-on electrons energetic enough to themselves produce a visible signal are emitted. The distribution of electron recoil energies scales with the inverse squared of the electron recoil energy,where we have taken the relativistic mCP limit. Lowenergy thresholds are therefore key to detect these "δrays" produced by mCPs. The expected deflection of mCPs after each interaction is small. Therefore, mCPs will travel to the detector in an approximately straight path and will point back to the target [11]. Searches for mCPs have been conducted, with low-mass regions covered by low-energy experimen...

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“…This has also motivated dedicated experiments [12], mainly focused on massive dark-photon searches though [13]. Recently, there has been a renewed interest for viable cosmological scenarios with DM that is charged under a U (1) gauge group in the dark sector, decoupled from SM forces, and mediated by massless dark photons [14]. Constraints on DM charged under U (1) interactions have been revisited, allowing for viable unexplored cosmological models with large couplings in the dark sector.…”

Section: Introductionmentioning

confidence: 99%

“…Then, since the U (1) gauge symmetry is exact, the dark fermions have to be stable, and therefore are potential DM candidates. Then, the GRFM can provide a basis for a viable charged DM scenario, as, for instance, the one suggested in [14].…”

Section: Introductionmentioning

confidence: 99%

Dark-photon searches via ZH production at e+e− colliders

et al. 2017

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We study the ZH associated production followed by the Higgs H → γγ decay into a photon plus an invisible and massless dark photon, at future high-energy e + e − facilities. Large H → γγ decay rates (with branching ratios up to a few percent) are allowed, thanks to possible nondecoupling properties of the Higgs boson under specific conditions, and unsuppressed darkphoton couplings in the dark sector. Such large decay rates can be obtained in the framework of recent flavor models that aim to naturally explain the observed spread in the fermion mass spectrum. We analyze the experimental prospects for observing the e + e − → ZH process followed by the semi-invisible Higgs decay into a photon plus a massless invisible system. Search strategies for both the leptonic and the hadronic final states (arising from Z → µ + µ − and Z → qq, respectively) are outlined. We find that a 5σ sensitivity to a branching fraction BR γγ ∼ 3 × 10 −4 can be achieved by combining the two channels with an integrated luminosity of 10 ab −1 at a c.m. energy of 240 GeV. This is considerably better than the corresponding sensitivity in alternative channels previously studied at lepton colliders. The analysis is model independent, and its results can be straightforwardly applied to the search of any Higgs twobody decay into a photon plus an undetected light particle.

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Make dark matter charged again

Cited by 121 publications

References 85 publications

Charged composite scalar dark matter

Charged composite scalar dark matter

Improved Limits on Millicharged Particles Using the ArgoNeuT Experiment at Fermilab

Dark-photon searches via ZH production at e+e− colliders

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