Direct detection of dark matter in models with a light Z′

Frandsen, Mads T.; Kahlhoefer, Felix; Sarkar, S.; Schmidt-Hoberg, Kai

doi:10.1007/jhep09(2011)128

Cited by 108 publications

(108 citation statements)

References 51 publications

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“…For arbitrary ε γ,Z , this scenario is maximally isospin-violating in the sense that any ratio of ε p /ε n is allowed [78]. For a given nucleus N with proton number Z and mass number A, the spin independent cross section is, in the limit of zero momentum transfer (q 2 = 0),…”

Section: Portals For Light Mediatorsmentioning

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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Section: Portals For Light Mediatorsmentioning

confidence: 99%

Direct detection portals for self-interacting dark matter

Kaplinghat

Tulin²,

Yu³

2014

Phys. Rev. D

164

229

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“…There are at least two well motivated ways to couple a new light Z to the SM without affecting the huge phenomenological success of the SM [36][37][38][39][40][41][42][43][44][45]. The first is to couple the new boson via kinetic mixing with the hypercharge vector.…”

Section: A Light Z S and Met Signaturesmentioning

confidence: 99%

Unitarity and monojet bounds on models for DAMA, CoGeNT, and CRESST-II

2012

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If dark matter interacts with quarks or gluons, the mediator of these interactions is either directly accessible at the LHC or is so heavy that its effects are encoded in contact operators. We find that the self-consistency of a contact operator description at the LHC implies bounds on the mediator scale stronger than those found from missing energy searches. This translates into spin-independent elastic scattering cross-sections at a level < ∼ 10 −41 cm 2 , with direct implications for the DAMA, CoGeNT, and CRESST-II anomalies. We then carefully explore the potential of monojet searches in the light mediator limit, focusing on a Z model with arbitrary couplings to quarks and dark matter. We find that Tevatron data currently provides the most stringent bounds for dark matter and Z masses below 100 GeV, and that these searches can constrain models for the DAMA, CoGeNT, and CRESST-II anomalies only if the mediator can decay to a pair of dark matter particles.

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“…A similar rigidity in the pattern of isospin interactions is present in many other portals. Previous works have shown that a deviation from these patterns would require the presence of several mediators whose contributions to the cross section interfere, and hence, generate an amount of isospin violation potentially tunable [22,[28][29][30][31].…”

Section: Jhep04(2015)175mentioning

confidence: 99%

“…In this scenario, a hidden sector communicates with the SM via a gauge boson, provided that the SM is enlarged with an extra abelian gauge group [19]. The phenomenology of these constructions is very rich, and ranges from colliders to direct and indirect searches of DM [20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Isospin violating dark matter in Stückelberg portal scenarios

Lozano

Peiró

Soler

2015

J. High Energ. Phys.

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Hidden sector scenarios in which dark matter (DM) interacts with the Standard Model matter fields through the exchange of massive Z bosons are well motivated by certain string theory constructions. In this work, we thoroughly study the phenomenological aspects of such scenarios and find that they present a clear and testable consequence for direct DM searches. We show that such string motivated Stückelberg portals naturally lead to isospin violating interactions of DM particles with nuclei. We find that the relations between the DM coupling to neutrons and protons for both, spin-independent (f n /f p ) and spin-dependent (a n /a p ) interactions, are very flexible depending on the charges of the quarks under the extra U(1) gauge groups. We show that within this construction these ratios are generically different from ±1 (i.e. different couplings to protons and neutrons) leading to a potentially measurable distinction from other popular portals. Finally, we incorporate bounds from searches for dijet and dilepton resonances at the LHC as well as LUX bounds on the elastic scattering of DM off nucleons to determine the experimentally allowed values of f n /f p and a n /a p .

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Direct detection of dark matter in models with a light Z′

Cited by 108 publications

References 51 publications

Direct detection portals for self-interacting dark matter

Direct detection portals for self-interacting dark matter

Unitarity and monojet bounds on models for DAMA, CoGeNT, and CRESST-II

Isospin violating dark matter in Stückelberg portal scenarios

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