Direct detection of dark matter polarizability

Ovanesyan, Grigory; Vecchi, Luca

doi:10.1007/jhep07(2015)128

Cited by 21 publications

(37 citation statements)

References 31 publications

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“…Finally, with F i F j we denote the nuclear form factor averaged over the velocity integral and the detector efficiency [82]. We follow the analysis of the LUX experiment and use a standard Maxwellian velocity distribution with v 0 = 220 km/s.…”

Section: Jhep05(2016)089mentioning

confidence: 99%

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A 750 GeV portal: LHC phenomenology and dark matter candidates

DʼEramo

Vries

Panci

2016

J. High Energ. Phys.

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Abstract:We study the effective field theory obtained by extending the Standard Model field content with two singlets: a 750 GeV (pseudo-)scalar and a stable fermion. Accounting for collider productions initiated by both gluon and photon fusion, we investigate where the theory is consistent with both the LHC diphoton excess and bounds from Run 1. We analyze dark matter phenomenology in such regions, including relic density constraints as well as collider, direct, and indirect bounds. Scalar portal dark matter models are very close to limits from direct detection and mono-jet searches if gluon fusion dominates, and not constrained at all otherwise. Pseudo-scalar models are challenged by photon line limits and mono-jet searches in most of the parameter space.

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Section: Jhep05(2016)089mentioning

confidence: 99%

“…The Helm (F H ) and Raleigh (F R ) form factors we take, respectively, from refs. [87] and [82] where, for the latter, we set the two-body parameter c 2 = 0.…”

Section: Jhep05(2016)089mentioning

confidence: 99%

A 750 GeV portal: LHC phenomenology and dark matter candidates

DʼEramo

Vries

Panci

2016

J. High Energ. Phys.

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“…At dimension six there are also the Rayleigh operators (ϕ * ϕ)F µν F µν and (ϕ * ϕ)F µν F µν which, however, lead to scattering rates suppressed by a factor of α compared to Q (6) 7 [41]. For real scalar DM the operators Q (6) 1,q , Q (6) 2,q , and Q (6) 7 vanish, and one would need to consider subleading operators.…”

Section: Scalar Dark Mattermentioning

confidence: 99%

Chiral effective theory of dark matter direct detection

Bishara

Brod

Grinstein

et al. 2017

J. Cosmol. Astropart. Phys.

110

148

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We present the effective field theory for dark matter interactions with the visible sector that is valid at scales of O(1 GeV). Starting with an effective theory describing the interactions of fermionic and scalar dark matter with quarks, gluons and photons via higher dimension operators that would arise from dimension-five and dimension-six operators above electroweak scale, we perform a nonperturbative matching onto a heavy baryon chiral perturbation theory that describes dark matter interactions with light mesons and nucleons. This is then used to obtain the coefficients of the nuclear response functions using a chiral effective theory description of nuclear forces. Our results consistently keep the leading contributions in chiral counting for each of the initial Wilson coefficients.

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“…Constraints on DM interactions through these electric and magnetic polarizabilities can be found in Refs. [7][8][9][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Anapole dark matter annihilation into photons

Latimer¹

2017

Phys. Rev. D

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In models of anapole dark matter (DM), the DM candidate is a Majorana fermion whose primary interaction with standard model (SM) particles is through an anapole coupling to off-shell photons. As such, at tree-level, anapole DM undergoes p-wave annihilation into SM charged fermions via a virtual photon. But, generally, Majorana fermions are polarizable, coupling to two real photons. This fact admits the possibility that anapole DM can annihilate into two photons in an s-wave process. Using an explicit model, we compute both the tree-level and diphoton contributions to the anapole DM annihilation cross section. Depending on model parameters, the s-wave process can either rival or be dwarfed by the p-wave contribution to the total annihilation cross section. Subjecting the model to astrophysical upper bounds on the s-wave annihilation mode, we rule out the model with large s-wave annihilation.

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Direct detection of dark matter polarizability

Cited by 21 publications

References 31 publications

A 750 GeV portal: LHC phenomenology and dark matter candidates

A 750 GeV portal: LHC phenomenology and dark matter candidates

Chiral effective theory of dark matter direct detection

Anapole dark matter annihilation into photons

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