What is the cosmion?

Gelmini, Graciela B.; Hall, Lawrence J.; Lin, Meng-Xiang

doi:10.1016/0550-3213(87)90424-x

Cited by 84 publications

(64 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We do not require the Z interactions with the SM to yield the correct thermal relic density for χ as the DM relic density may well be of asymmetric origin. In particular the mass range required to fit DAMA and CoGeNT is natural in models of asymmetric DM (ADM), where the observed cosmological DM energy density is realised for m χ ∼ 1 − 10 GeV [37,38]. Moreover the ADM scenario avoids the otherwise significant constraints from annihilation of light DM, such as from the Sun [39,40].…”

Section: Limits On the Mixing Parametersmentioning

confidence: 99%

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

Frandsen

Kahlhoefer

Sarkar

et al. 2011

J. High Energ. Phys.

108

104

View full text Add to dashboard Cite

We discuss the direct detection signatures of dark matter interacting with nuclei via a new neutral gauge boson Z , focussing on the case where both the dark matter and the Z have mass of a few GeV. Isospin violation (i.e. different couplings to protons and neutrons) arises naturally in this scenario. In particular it is possible to reconcile the preferred parameter regions inferred from the observed DAMA and CoGeNT modulations with the bounds from XENON100, which requires f n /f p −0.7. Moreover, the Z mediator can also yield a large spin-dependent cross-section which could contribute to the DAMA signal, while the spin-independent cross-section is adequate to explain the CoGeNT signal.

show abstract

Section: Limits On the Mixing Parametersmentioning

confidence: 99%

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

Frandsen

Kahlhoefer

Sarkar

et al. 2011

J. High Energ. Phys.

108

104

View full text Add to dashboard Cite

show abstract

“…In these models the DM density is set by its particleanti-particle asymmetry, similar to the baryon asymmetry, rather than by its annihilation cross-section. While the idea that DM may carry a particle asymmetry has existed in the literature for a long time [1][2][3][4][5][6][7][8], it has only been relatively recently that robust classes of models based on higher dimension operators were introduced [9].…”

Section: Introductionmentioning

confidence: 99%

Indirect detection signatures for the origin of asymmetric dark matter

Zhao

Zurek

2014

J. High Energ. Phys.

View full text Add to dashboard Cite

Abstract:We study the decay signatures of Asymmetric Dark Matter (ADM) via higher dimension operators which are responsible for generating the primordial dark matter (DM) asymmetry. Since the signatures are sensitive both to the nature of the higher dimension operator generating the DM asymmetry and to the sign of the baryon or lepton number that the DM carries, indirect detection may provide a window into the nature of the mechanism which generates the DM asymmetry. We consider in particular dimension-6 fermionic operators of the form(or operators related through a Hermitian conjugate) with the scale M around or just below the GUT scale. We derive constraints on ADM particles both in the natural mass range (around a few GeV), as well as in the range between 100 GeV to 10 TeV. For light ADM, we focus on constraints from both the low energy gamma ray data and proton/antiproton fluxes. For heavy ADM, we consider γ-rays and proton/anti-proton fluxes, and we fit e + /e − data from AMS-02 and H.E.S.S. (neglecting the Fermi charged particle fluxes which disagree with AMS-02 below 100 GeV). We show that, although the best fit regions from electron/positron measurement are still in tension with other channels on account of the H.E.S.S. measurement at high energies, compared to an ordinary symmetric dark matter scenario, the decay of DM with a primordial asymmetry reduces the tension. Better measurement of the flux at high energy will be necessary to draw a definite conclusion about the viability of decaying DM as source for the signals.

show abstract

“…We use the millimeter unit for the displacement since the detectors at the LHC can roughly resolve the displaced vertex up to a millimeter. Assuming that the LOSP decays through only one dominant coupling 1=M ijk that does not involve the third generation, 2 we list the three-body LOSP decays for each …”

Section: Prompt Versus Displaced Vertex Losp Decays At Collidersmentioning

confidence: 99%

“…2 The third generation complicates the general discussion because the top-quark mass cannot be ignored and the thirdgeneration squarks generally have a large mixing. We leave the third-generation-specific scenarios for future work.…”

Section: Prompt Versus Displaced Vertex Losp Decays At Collidersmentioning

confidence: 99%

Flavor and collider signatures of asymmetric dark matter

Kim

Zurek

2014

Phys. Rev. D

View full text Add to dashboard Cite

We consider flavor constraints on, and collider signatures of, asymmetric dark matter (ADM) via higher dimension operators. In the supersymmetric models we consider, R-parity-violating (RPV) operators carrying B − L interact with n dark matter particles X through an interaction of the formThis interaction ensures that the lightest ordinary supersymmetric particle is unstable to decay into the X sector, leading to a higher multiplicity of final state particles and reduced missing energy at a collider. Flavor-violating processes place constraints on the scale of the higher dimension operator, impacting whether the LOSP decays promptly. While the strongest limitations on RPV from n −n oscillations and proton decay do not apply to ADM, we analyze the constraints from meson mixing, μ − e conversion, μ → 3e and b → sl þ l − . We show that these flavor constraints, even in the absence of flavor symmetries, allow parameter space for prompt decay to the X sector, with additional jets and leptons in exotic flavor combinations. We study the constraints from existing 8 TeV LHC Supersymmetry (SUSY) searches with (i) 2-6 jets plus missing energy and (ii) 1-2 leptons, 3-6 jets plus missing energy, comparing the constraints on ADM-extended supersymmetry with the usual supersymmetric simplified models.

show abstract

What is the cosmion?

Cited by 84 publications

References 10 publications

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

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

Indirect detection signatures for the origin of asymmetric dark matter

Flavor and collider signatures of asymmetric dark matter

Contact Info

Product

Resources

About