Abundance of cosmological relics in low-temperature scenarios

Drees, Manuel; Iminniyaz, Hoernisa; Kakizaki, Mitsuru

doi:10.1103/physrevd.73.123502

Cited by 44 publications

(55 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The uncertainties in the thermal history of the Universe prior to BBN limit our understanding of the origins of dark matter [12,15,16,20,23,[31][32][33][34]. We study the effects of kination on the thermal production of dark matter.…”

Section: Introductionmentioning

confidence: 99%

New constraints on dark matter production during kination

Redmond

Erickcek

2017

Phys. Rev. D

View full text Add to dashboard Cite

Our ignorance of the period between the end of inflation and the beginning of Big Bang Nucleosynthesis limits our understanding of the origins and evolution of dark matter. One possibility is that the Universe's energy density was dominated by a fast-rolling scalar field while the radiation bath was hot enough to thermally produce dark matter. We investigate the evolution of the dark matter density and derive analytic expressions for the dark matter relic abundance generated during such a period of kination. Kination scenarios in which dark matter does not reach thermal equilibrium require σv < 2.7 × 10 −38 cm 3 s −1 to generate the observed dark matter density while allowing the Universe to become radiation dominated by a temperature of 3 MeV. Kination scenarios in which dark matter does reach thermal equilibrium require σv > 3 × 10 −26 cm 3 s −1 in order to generate the observed dark matter abundance. We use observations of dwarf spheroidal galaxies by the Fermi Gamma-Ray Telescope and observations of the Galactic Center by the High Energy Stereoscopic System to constrain these kination scenarios. Combining the unitarity constraint on σv with these observational constraints sets a lower limit on the temperature at which the Universe can become radiation dominated following a period of kination if σv > 3 × 10 −31 cm 3 s −1 . This lower limit is between 0.05 GeV and 1 GeV, depending on the dark matter annihilation channel.

show abstract

Section: Introductionmentioning

confidence: 99%

New constraints on dark matter production during kination

Redmond

Erickcek

2017

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…We expect that it should be possible to construct other interesting new cosmological benchmarks from examples already in the literature [39]- [44]. Note that a different cosmological benchmark with a larger dilution factor could look better than Slinky.…”

Section: Resultsmentioning

confidence: 99%

Colliders as a simultaneous probe of supersymmetric dark matter and Terascale cosmology

Barenboim

Lykken

2006

J. High Energy Phys.

View full text Add to dashboard Cite

Terascale supersymmetry has the potential to provide a natural explanation of the dominant dark matter component of the standard ΛCDM cosmology. However once we impose the constraints on minimal supersymmetry parameters from current particle physics data, a satisfactory dark matter abundance is no longer prima facie natural. This Neutralino Tuning Problem could be a hint of nonstandard cosmology during and/or after the Terascale era. To quantify this possibility, we introduce an alternative cosmological benchmark based upon a simple model of quintessential inflation. This benchmark has no free parameters, so for a given supersymmetry model it allows an unambiguous prediction of the dark matter relic density. As a example, we scan over the parameter space of the CMSSM, comparing the neutralino relic density predictions with the bounds from WMAP. We find that the WMAP-allowed regions of the CMSSM are an order of magnitude larger if we use the alternative cosmological benchmark, as opposed to ΛCDM. Initial results from the CERN Large Hadron Collider will distinguish between the two allowed regions.

show abstract

“…The initial LSP abundance is related to Y σ as Y (c) χ , and therefore the relic LSP abundance saturates to the value given by (31). Even when the saxion field does not dominate the universe before its decay, the LSP coming from the saxion decay tends to exceed the critical abundance Y (c) χ .…”

Section: Dark Matter From Saxion Decaymentioning

confidence: 99%

Nonthermal production of dark matter from a late-decaying scalar field at an intermediate scale

Endo

Takahashi

2006

Phys. Rev. D

View full text Add to dashboard Cite

We examine non-thermal dark matter production from a late-decaying scalar field, with a particular attention on non-renormalizable operators of D = 5 through which the scalar field decays into the standard model particles and their superpartners. We show that almost the same number of superparticles as that of particles are generally produced from the decay. To avoid the gravitino overproduction problem, the decay is favored to proceed via interactions with an intermediate cut-off scale M ≪ M P . This should be contrasted to the conventional scenario using the modulus decay. The bosonic supersymmetry partner of the axion, i.e., saxion, is proposed as a natural candidate for such late-decaying scalar fields. We find that a right amount of the wino/higgsino dark matter with a mass of O(100) GeV is obtained for the saxion mass around the weak scale and axion decay constant, F A = O(10 9−12 ) GeV.

show abstract

Abundance of cosmological relics in low-temperature scenarios

Cited by 44 publications

References 27 publications

New constraints on dark matter production during kination

New constraints on dark matter production during kination

Colliders as a simultaneous probe of supersymmetric dark matter and Terascale cosmology

Nonthermal production of dark matter from a late-decaying scalar field at an intermediate scale

Contact Info

Product

Resources

About