Relic abundance of asymmetric Dark Matter in quintessence

Iminniyaz, Hoernisa; Chen, Xuelei

doi:10.1016/j.astropartphys.2013.12.003

Cited by 19 publications

(26 citation statements)

References 33 publications

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“…When the operator decouples as the Universe expands, the asymmetries freeze in. This mechanism can be extended to non-standard cosmologies [269,270].…”

Section: Asymmetric Dark Matter (Adm)mentioning

confidence: 96%

Dark matter production in the early Universe: Beyond the thermal WIMP paradigm

et al. 2015

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a b s t r a c tIncreasingly stringent limits from LHC searches for new physics, coupled with lack of convincing signals of weakly interacting massive particle (WIMP) in dark matter searches, have tightly constrained many realizations of the standard paradigm of thermally produced WIMPs as cold dark matter. In this article, we review more generally both thermally and non-thermally produced dark matter (DM). One may classify DM models into two broad categories: one involving bosonic coherent motion (BCM) and the other involving WIMPs. BCM and WIMP candidates need, respectively, some approximate global symmetries and almost exact discrete symmetries. Supersymmetric axion models are highly motivated since they emerge from compelling and elegant solutions to the two fine-tuning problems of the Standard Model: the strong CP problem and the gauge hierarchy problem. We review here non-thermal relics in a general setup, but we also pay particular attention to the rich cosmological properties of various aspects of mixed SUSY/axion dark matter candidates which can involve both WIMPs and BCM in an interwoven manner. We also review briefly a panoply of alternative thermal and non-thermal DM candidates.

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“…When the operator decouples as the Universe expands, the asymmetries freeze in. This mechanism can be extended to non-standard cosmologies [269,270].…”

Section: Asymmetric Dark Matter (Adm)mentioning

confidence: 96%

Dark matter production in the early Universe: Beyond the thermal WIMP paradigm

et al. 2015

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“…If the universe experiences a non-standard expansion law at early times, and in particular during the era of dark matter decoupling, particle freeze-out may be accelerated (or delayed) and the relic abundance enhanced (or suppressed) [4][5][6][7][8][9][10][11][12] (see also [13]). …”

Section: Introductionmentioning

confidence: 99%

“…where the matter energy momentum tensor is now given by 10) and the scalar field energy momentum tensor is…”

Section: Introductionmentioning

confidence: 99%

Dark matter relic density in scalar-tensor gravity revisited

Meehan

Whittingham

2015

J. Cosmol. Astropart. Phys.

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Abstract. We revisit the calculation of dark matter relic abundances in scalar-tensor gravity using a generic form A(ϕ * ) = e βϕ 2 * /2 for the coupling between the scalar field ϕ * and the metric, for which detailed Big Bang Nucleosynthesis constraints are available. We find that BBN constraints restrict the modified expansion rate in these models to be almost degenerate with the standard expansion history at the time of dark matter decoupling. In this case the maximum level of enhancement of the dark matter relic density was found to be a factor of ∼ 3, several orders of magnitude below that found in previous investigations.

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“…Usually the indirect detection is not available for the asymmetric Dark Matter. However, for asymmetric Dark Matter in nonstandard cosmological scenarios including quintessence, scalar-tensor model and brane world cosmology [9,10,11], the relic densities for both particle and antiparticle are increased in due to the enhanced Hubble expansion rate. Again for appropriate cross section, the relic density for both particle and anti-particle are almost in the same amount which is different from the standard cosmological scenario where the anti-particle relic density is depressed .…”

Section: Constraints On Parameter Spacementioning

confidence: 99%

“…The modified Hubble expansion rate affects the relic density of asymmetric Dark Matter. The asymmetric Dark Matter relic density is already investigated in such models including quintessence model, scalar-tensor model [9,10,11]. In quintessence model, scalar-tensor models, the relic densities of both particles and anti-particles are increased simultaneously due to the increased Hubble expansion rate.…”

Section: Introductionmentioning

confidence: 99%

Abundance of Asymmetric Dark Matter in Brane World Cosmology

Abdusattar

Iminniyaz

2016

Commun. Theor. Phys.

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Relic abundance of asymmetric Dark Matter particles in brane world cosmological scenario is investigated in this article. Hubble expansion rate is enhanced in brane world cosmology and it affects the relic abundance of asymmetric Dark Matter particles. We analyze how the relic abundance of asymmetric Dark Matter is changed in this model.We show that in such kind of nonstandard cosmological scenario, indirect detection of asymmetric Dark Matter is possible if the cross section is small enough which let the anti-particle abundance kept in the same amount with the particle. We show the indirect detection signal constraints can be used to such model only when the cross section and the 5 dimensional Planck mass scale are in appropriate values.

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Relic abundance of asymmetric Dark Matter in quintessence

Cited by 19 publications

References 33 publications

Dark matter production in the early Universe: Beyond the thermal WIMP paradigm

Dark matter production in the early Universe: Beyond the thermal WIMP paradigm

Dark matter relic density in scalar-tensor gravity revisited

Abundance of Asymmetric Dark Matter in Brane World Cosmology

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