Collider constraints on dipole-interacting dark matter

Fortin, Jean-François; Tait, Tim M. P.

doi:10.1103/physrevd.85.063506

Cited by 94 publications

(115 citation statements)

References 54 publications

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“…The processes that lead to constraints are mono-photon production (from initial or final state) plus missing energy due to the pair of DM particles in e + e − collisions at LEP, or mono-jet production plus missing energy in proton-antiproton collision in Tevatron, or proton-proton collisions at LHC. In the case of magnetic DM these constraints have been studied in [48,49] where it is found that the upper bound on λ χ is safely above the range of values of λ χ relevant for the direct search experiments (for the range of m χ ∼ 10 GeV).…”

Section: Collider and Other Astrophysical Constraintsmentioning

confidence: 99%

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Light magnetic dark matter in direct detection searches

Nobile

Kouvaris

Panci

et al. 2012

J. Cosmol. Astropart. Phys.

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We study a fermionic Dark Matter particle carrying magnetic dipole moment and analyze its impact on direct detection experiments. In particular we show that it can accommodate the DAMA, CoGeNT and CRESST experimental results. Assuming conservative bounds, this candidate is shown not to be ruled out by the CDMS, XENON and PICASSO experiments. We offer an analytic understanding of how the long-range interaction modifies the experimental allowed regions, in the cross section versus Dark Matter mass parameter space, with respect to the typically assumed contact interaction. Finally, in the context of a symmetric Dark Matter sector, we determine the associated thermal relic density, and further provide relevant constraints imposed by indirect searches and colliders.

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Section: Collider and Other Astrophysical Constraintsmentioning

confidence: 99%

“…We refer to [23,[38][39][40][41][42][43][44][45][46][47][48][49][50] for a limited sample of the earlier literature.…”

Section: Introductionmentioning

confidence: 99%

Light magnetic dark matter in direct detection searches

Nobile

Kouvaris

Panci

et al. 2012

J. Cosmol. Astropart. Phys.

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“…For heavy quarks, the parameter f N Q is induced by the gluon operator as discussed in [40], see also [39]. Here, The photon field is also encoded in B μν but it is a degree of freedom of the low-energy theory, and the resulting longrange interaction between χ and nucleons severely constrains the Wilson coefficient of the dipole operator [41][42][43]. The Higgs operator O S HH gives rise to O SS qq after EW symmetry breaking, and upon integrating out the heavy quarks also the dimension-7 interaction with the gluon field strength O S gg is generated.…”

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confidence: 99%

New Constraints on Dark Matter Effective Theories from Standard Model Loops

2014

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We consider an effective field theory for a gauge singlet Dirac dark matter particle interacting with the standard model fields via effective operators suppressed by the scale Λ ≳ 1 TeV. We perform a systematic analysis of the leading loop contributions to spin-independent Dirac dark matter-nucleon scattering using renormalization group evolution between Λ and the low-energy scale probed by direct detection experiments. We find that electroweak interactions induce operator mixings such that operators that are naively velocity suppressed and spin dependent can actually contribute to spin-independent scattering. This allows us to put novel constraints on Wilson coefficients that were so far poorly bounded by direct detection. Constraints from current searches are already significantly stronger than LHC bounds, and will improve in the near future. Interestingly, the loop contribution we find is isospin violating even if the underlying theory is isospin conserving. DOI: 10.1103/PhysRevLett.112.191304 PACS numbers: 95.35.+d, 11.10.Gh, 11.10.Hi, 12.15.Lk Introduction.-A weakly interacting massive particle (WIMP) is an appealing dark matter (DM) candidate [1][2][3][4]. The lack of evidence for new physics at the Fermi scale motivates us to remain unbiased about the nature of DM and pursue model-independent approaches. Assuming that the DM is the only non-standard model (SM) particle experimentally accessible is not always justified at colliders [5][6][7], and simplified models have been recently proposed to overcome this limitation [8][9][10][11]. Nevertheless, besides very specific cases (e.g., inelastic DM [12]), it is an excellent approximation for direct searches given the small energy exchanged with the target nuclei. Within this approach, DM interactions with SM fields can be parameterized by higher dimensional operators suppressed by the cutoff scale Λ, with the main strength of providing model-independent relations among distinct null DM searches [13][14][15][16][17][18][19][20]. However, different search strategies probe different energy scales, and such a separation of scales may have striking consequences when a connection between different experiments or ultraviolet (UV) complete models with experiments is attempted. Indeed, in some cases loop corrections are known to dramatically alter direct detection (DD) rates [21][22][23][24][25][26][27][28][29].In this Letter we consider the case of a SM gauge singlet Dirac DM (χ), with m χ < Λ, and we calculate the complete set of one-loop effects induced by SM fields for operators up to dimension 6 that contribute to spin-independent (SI) DM-nucleon scattering. The separation between Λ and the DD scale is systematically taken into account via a proper renormalization group (RG) analysis. This procedure requires as a first step the computation of both electroweak (EW) and QCD running from the scale Λ to the EW symmetry breaking scale where threshold corrections are calculated and the heavy SM fields (Higgs boson, top quark, W and Z bosons) get integrated out, giv...

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“…Among the loop-induced DM-SM interactions, an especially important status is held by the dipole and Rayleigh operators [43,44], which play important roles in DM model building. Collider constraints on these couplings within the EFT approach have been explored in several previous studies [45][46][47][48][49], but the resulting bounds translate into very weak constraints on the mediator masses, thus calling for a simplified model description.…”

Section: Jhep07(2015)031mentioning

confidence: 99%

The dark penguin shines light at colliders

Primulando

Salvioni

Tsai

2015

J. High Energ. Phys.

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Abstract:Collider experiments are one of the most promising ways to constrain Dark Matter (DM) interactions. For several types of DM-Standard Model couplings, a meaningful interpretation of the results requires to go beyond effective field theory, considering simplified models with light mediators. This is especially important in the case of loopmediated interactions. In this paper we perform the first simplified model study of the magnetic dipole interacting DM, by including the one-loop momentum-dependent form factors that mediate the coupling -given by the Dark Penguin -in collider processes. We compute bounds from the monojet, monophoton, and diphoton searches at the 8 and 14 TeV LHC, and compare the results to those of direct and indirect detection experiments. Future searches at the 100 TeV hadron collider and at the ILC are also addressed. We find that the optimal search strategy requires loose cuts on the missing transverse energy, to capture the enhancement of the form factors near the threshold for on-shell production of the mediators. We consider both minimal models and models where an additional state beyond the DM is accessible. In the latter case, under the assumption of anarchic flavor structure in the dark sector, the LHC monophoton and diphoton searches will be able to set much stronger bounds than in the minimal scenario. A determination of the mass of the heavier dark fermion might be feasible using the M T 2 variable. In addition, if the Dark Penguin flavor structure is almost aligned with that of the DM mass, a displaced signal from the decay of the heavier dark fermion into the DM and photon can be observed. This allows us to set constraints on the mixings and couplings of the model from an existing search for non-pointing photons.

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Collider constraints on dipole-interacting dark matter

Cited by 94 publications

References 54 publications

Light magnetic dark matter in direct detection searches

Light magnetic dark matter in direct detection searches

New Constraints on Dark Matter Effective Theories from Standard Model Loops

The dark penguin shines light at colliders

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