Results 11 to 20 of about 92,121 (267)
Journal of High Energy Physics, 2022 We introduce Super-Resonant Dark Matter, a model of self-interacting dark matter based on the low energy effective theory of supersymmetric QCD. The structure of the theory ensures a resonant enhancement of the self-interactions of the low energy mesons,
Csaba Csáki +5 more
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Improvements on a unified dark matter model [PDF]
Astronomy Letters, 2016 AbstractWe study, by means of a spherical collapse model, the effect of shear, rotation, and baryons on a generalized Chaplygin gas (gCg) dominated universe. We show that shear, rotation, and the presence of baryons slow down the collapse compared to the simple spherical collapse model.
Del Popolo, A, Lee, XG
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Anapole moment of Majorana fermions and implications for direct detection of neutralino dark matter
Journal of High Energy Physics, 2023 For Majorana fermions the anapole moment is the only allowed electromagnetic multipole moment. In this work we calculate the anapole moment induced at one-loop by the Yukawa and gauge interactions of a Majorana fermion, using the pinch technique to ...
Alejandro Ibarra +2 more
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Asymmetries in extended dark sectors: a cogenesis scenario
Journal of High Energy Physics, 2023 The observed dark matter relic abundance may be explained by different mechanisms, such as thermal freeze-out/freeze-in, with one or more symmetric/asymmetric components. In this work we investigate the role played by asymmetries in determining the yield
Juan Herrero-García +2 more
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A model of dark matter and energy
Modern Physics Letters A, 2023 We discuss a model of the universe where dark energy is replaced by electrically-charged extremely-massive dark matter. The cosmological constant has a value of the same order as the mean matter density, consistent with observations, and is obtained classically without fine-tuning.
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Model of metastable EeV dark matter [PDF]
Physical Review D, 2020 We propose a model where a long-lived pseudoscalar EeV particle can be produced with sufficient abundance so as to account for the cold dark matter density, despite having a Planck mass suppressed coupling to the thermal bath. Connecting this state to a hidden sterile neutrino sector through derivative couplings, induced by higher dimensional operators,
Emilian Dudas +4 more
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The Z 7 model of three-component scalar dark matter
Journal of High Energy Physics, 2023 We investigate, for the first time, a scenario where the dark matter consists of three complex scalar fields that are stabilized by a single Z 7 symmetry.
Geneviève Bélanger +3 more
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Revival of the unified dark energy–dark matter model? [PDF]
Physical Review D, 2004 We consider the generalized Chaplygin gas (GCG) proposal for unification of dark energy and dark matter and show that it admits an unique decomposition into dark energy and dark matter components once phantom-like dark energy is excluded. Within this framework, we study structure formation and show that difficulties associated to unphysical ...
Bento, M. C., Bertolami, O., Sen, A. A.
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Minimal model of Majoronic dark radiation and dark matter [PDF]
Physical Review D, 2014 27 pages,17 figures.
Chang, We-Fu, Ng, John N.
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Journal of High Energy Physics, 2023 We generalize the recently proposed continuum dark matter model to the case where the dark matter consists of a spin-1/2 or spin-1 gapped continuum. We construct simple continuum analogs of weakly interacting massive particles annihilating through the Z ...
Csaba Csáki, Ameen Ismail, Seung J. Lee
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