Analyzing the Discovery Potential for Light Dark Matter

Izaguirre, Eder; Krnjaic, Gordan; Schuster, Philip; Toro, Natalia

doi:10.1103/physrevlett.115.251301

Cited by 201 publications

(283 citation statements)

References 86 publications

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“…For smaller splittings and DM masses below a few GeV, we find that monophoton + missing momentum searches at Belle II could provide complementary sensitivity in this regime [96]. Finally, we comment that significant strong sensitivity could be achieved for m DM few GeV and small splittings with new electron beam-dump and active-target experiments [61,67,97,120,121], proposed proton-beam fixed target experiments [122][123][124], and future direct detection experiments [3] optimized for low threshold sensitivity. In this Appendix, we summarize the relevant cross sections and rates for the thermal relic abundances computed in Sec.…”

Section: Conclusion and Discussionmentioning

confidence: 96%

“…which is insensitive to individual choices for each parameter so long as their product remains fixed [67]. annihilation process DM + DM → A + A sets the relic abundance, which is independent of the A coupling to SM states.…”

Section: Grangian Containsmentioning

confidence: 99%

“…For ∆ = 0.1m1, we also show the projection for a proposed fixed-target missing-momentum experiment (orange dashed) drawn from Ref. [61]; since this search would veto visible energy from χ2 de-excitation, we conservatively assume it only has sensitivity to ∆ = 0.1m1. Also shown are constraints from LEP [62] and (g − 2)µ [9], whose sensitivities do not scale with y; see Sec.…”

Section: A Dark Photon Modelmentioning

confidence: 99%

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Discovering inelastic thermal relic dark matter at colliders

2016

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Dark Matter particles with inelastic interactions are ubiquitous in extensions of the StandardModel, yet remain challenging to fully probe with existing strategies. We propose a series of powerful searches at hadron and lepton colliders that are sensitive to inelastic dark matter dynamics. In representative models featuring either a massive dark photon or a magnetic dipole interaction, we find that the LHC and BaBar could offer strong sensitivity to the thermal-relic dark matter parameter space for dark matter masses between ∼ 100 MeV-100 GeV and fractional mass-splittings above the percent level; future searches at Belle II with a dedicated monophoton trigger could also offer sensitivity to thermal-relic scenarios with masses below a few GeV. Thermal scenarios with either larger masses or splittings are largely ruled out; lower masses remain viable yet may be accessible with other search strategies.

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Section: Conclusion and Discussionmentioning

confidence: 96%

Section: Grangian Containsmentioning

confidence: 99%

Section: A Dark Photon Modelmentioning

confidence: 99%

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Discovering inelastic thermal relic dark matter at colliders

2016

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“…Light mediators have been widely studied within many different contexts, e.g., hidden sector models [18], light DM models [19,20], Sommerfeld-enhanced models for indirect detection signals [21,22], and in connection with supersymmetry and the WIMP miracle [23][24][25][26]. The light force carrier can be probed by low energy experiments with high luminosities [27][28][29][30][31][32][33][34][35]. The effect of self-interactions can also be searched through various other astrophysical observations e.g.…”

Section: Introductionmentioning

confidence: 99%

Direct detection portals for self-interacting dark matter

Kaplinghat

Tulin²,

Yu³

2014

Phys. Rev. D

164

229

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Dark matter self-interactions can affect the small scale structure of the Universe, reducing the central densities of dwarfs and low surface brightness galaxies in accord with observations. From a particle physics point of view, this points toward the existence of a 1 − 100 MeV particle in the dark sector that mediates self-interactions. Since mediator particles will generically couple to the Standard Model, direct detection experiments provide sensitive probes of self-interacting dark matter. We consider three minimal mechanisms for coupling the dark and visible sectors: photon kinetic mixing, Z boson mass mixing, and the Higgs portal. Self-interacting dark matter motivates a new benchmark paradigm for direct detection via momentum-dependent interactions, and ton-scale experiments will cover astrophysically motivated parameter regimes that are unconstrained by current limits. Direct detection is a complementary avenue to constrain velocity-dependent self-interactions that evade astrophysical bounds from larger scales, such as those from the Bullet Cluster.

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“…However, significant gaps remain in our current search strategies for low-mass DM. Indeed, the MeV-to-GeV DM mass window remains an elusive blind spot in the current search effort [1], despite the existence of viable models [2][3][4][5][6][7][8] -including those invoked to explain the excess 511 keV photon line from the galactic bulge [9] with MeV scale DM annihilation into electron-positron pairs [3,4]. Recent progress in our understanding of the status of MeV-scale DM has come from a combination of re-interpretation of surface-level proton-beam neutrino experiments results [10][11][12][13], rare meson decays [14][15][16][17][18], electron beam dump experiments [19][20][21][22], Bfactories [19,23], precision measurements [5,19,24], the CMB [25][26][27][28][29], and DM-electron scattering in direct detection experiments [30].…”

Section: Introductionmentioning

confidence: 99%

MeV-scale dark matter deep underground

2015

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We demonstrate that current and planned underground neutrino experiments could offer a powerful probe of few-MeV dark matter when combined with a nearby high-intensity low-to-medium energy electron accelerator. This experimental setup, an underground beam-dump experiment, is capable of decisively testing the thermal freeze-out mechanism for several natural dark matter scenarios in this mass range. We present the sensitivity reach in terms of the mass-coupling parameter space of existing and planned detectors, such as Super-K, SNO+, and JUNO, in conjunction with a hypothetical 100 MeV energy accelerator. This setup can also greatly extend the sensitivity of direct searches for new light weakly-coupled force-carriers independently of their connection to dark matter.

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Analyzing the Discovery Potential for Light Dark Matter

Abstract: We analyze the present status of sub-GeV thermal dark matter annihilating through Standard Model mixing and identify a small set of future experiments that can decisively test these scenarios.

Cited by 201 publications

References 86 publications

Discovering inelastic thermal relic dark matter at colliders

Discovering inelastic thermal relic dark matter at colliders

Direct detection portals for self-interacting dark matter

MeV-scale dark matter deep underground

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