Shedding light on dark matter: A Faraday rotation experiment to limit a dark magnetic moment

Gardner, Susan

doi:10.1103/physrevd.79.055007

Cited by 40 publications

(24 citation statements)

References 161 publications

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“…Various experimental bounds and direct detection signals of these operators have been studied in Refs. [29][30][31][32][33][34][35][36][37][38]. We do not consider collider constraints for these operators further here and leave astrophysics bounds for future work [39].…”

Section: Effective Field Theory Of Wimp Couplingsmentioning

confidence: 99%

Constraints on dark matter from colliders

et al. 2010

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We show that colliders can impose strong constraints on models of dark matter, in particular, when the dark matter is light. We analyze models where the dark matter is a fermion or scalar interacting with quarks and/or gluons through an effective theory containing higher dimensional operators which represent heavier states that have been integrated out of the effective field theory. We determine bounds from existing Tevatron searches for monojets as well as expected LHC reaches for a discovery. We find that colliders can provide information which is complementary or in some cases even superior to experiments searching for direct detection of dark matter through its scattering with nuclei. In particular, both the Tevatron and the LHC can outperform spin-dependent searches by an order of magnitude or better over much of the parameter space, and if the dark matter couples mainly to gluons, the LHC can place bounds superior to any spin-independent search.

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Section: Effective Field Theory Of Wimp Couplingsmentioning

confidence: 99%

Constraints on dark matter from colliders

et al. 2010

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“…Since the heavier state decays to the lighter state through the dipole transition only after freeze-out, we effectively have two species during freeze-out, each of which can only annihilate on the other. The relic abundance necessary at freeze-out is therefore only half its usual value 4 . This implies that the total annihilation rate is larger σ tot v ≈ 6 × 10 −26 cm 3 /s.…”

Section: A Annihilation Rate and Relic Abundancementioning

confidence: 99%

How dark are Majorana WIMPs? Signals from magnetic inelastic dark matter and Rayleigh dark matter

2012

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The effective interactions of dark matter with photons are fairly restricted. Yet both direct detection as well as monochromatic γ ray signatures depend sensitively on the presence of such interactions. For a Dirac fermion, electromagnetic dipoles are possible, but are very constrained. For Majorana fermions, no such terms are allowed. We consider signals of an effective theory with a Majorana dark matter particle and its couplings to photons. In the presence of a nearby excited state, there is the possibility of a magnetic dipole transition (Magnetic inelastic Dark Matter or MiDM), which yields both direct and indirect detection signals, and, intriguingly, yields essentially the same size over a wide range of dipole strengths. Absent an excited state, the leading interaction of WIMPs is similar to the Rayleigh scattering of low energy photons from neutral atoms, which may be captured by an effective operator of dimension 7 of the formχχFµν F µν . While it can be thought of as a phase of the Magnetic inelastic Dark Matter scenario where the excited state is much heavier than the ground state, it can arise from other theories as well. We study the resulting phenomenology of this scenario: gamma ray lines from the annihilation of WIMPs; nuclear recoils in direct detection; and direct production of the WIMP pair in high-energy colliders. Considering recent evidence in particular for a 130 GeV line from the galactic center, we discuss the detection prospects at upcoming experiments.

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“…The relevant operators are shown in the second column of Table 2 for the different charge assignments. The mixing is either a direct bilinear mixing or is achieved after the Higgs boson develops a vacuum expectation value (VEV) 4 . We discuss in some detail the (2, -1/2) charge assignment, and comment on the other possibilities below.…”

Section: The Modelmentioning

confidence: 99%

“…Both dipole and Rayleigh operators give rise to the scattering, annihilation, and production of DM. The impact of the magnetic operator in a variety of observations has been the subject of several past works [1,2,3,4,5,6,7,8,9,10,11]. The Rayleigh operator was studied in more recent dedicated analyses [12,13,14,15], although older studies already appreciated its relevance for low energy experiments [2].…”

Section: Introductionmentioning

confidence: 99%

Looking for new charged states at the LHC: signatures of magnetic and Rayleigh dark matter

Liu

Shuve

Weiner

et al. 2013

J. High Energ. Phys.

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Magnetic and Rayleigh dark matter are models describing weak interactions of dark matter with electromagnetism through non-renormalizable operators of dimensions 5 and 7, respectively. Such operators motivate the existence of heavier states that couple to dark matter and are also charged under the electroweak interactions. The recent hints of a gammaray line in the Fermi data suggest that these states may be light enough to be produced at the LHC. We categorize such states according to their charges and decay modes, and we examine the corresponding LHC phenomenology. We emphasize unconstrained models that can be discovered in targeted searches at the upgraded LHC run, while also enumerating models excluded by current data. Generally, models with SU W (2)-singlet states or models where the charged states decay predominantly to tau leptons and/or gauge bosons are still viable. We propose searches to constrain such models and, in particular, find superior performance over existing proposals for some multi-tau final states. Finally, we note several scenarios, especially those dominated by tau final states, that cannot be probed even with 300/fb at LHC14, motivating the further refinement of tau-lepton searches to improve sensitivity to such final states.

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Shedding light on dark matter: A Faraday rotation experiment to limit a dark magnetic moment

Cited by 40 publications

References 161 publications

Constraints on dark matter from colliders

Constraints on dark matter from colliders

How dark are Majorana WIMPs? Signals from magnetic inelastic dark matter and Rayleigh dark matter

Looking for new charged states at the LHC: signatures of magnetic and Rayleigh dark matter

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