Point sources from dissipative dark matter

Agrawal, Prateek; Randall, Lisa

doi:10.1088/1475-7516/2017/12/019

Cited by 30 publications

(24 citation statements)

References 142 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main detector is a 692 t glass calorimeter (SiO 2 , on average A 20.7 per nucleus), and has an active area of 3.7 × 3.7 m 2 , about 870 m away from the target along the beam axis [61]. In this study, we focus on the single electron recoil signals, as the detector has an almost 100% efficiency to record electromagnetic showers for recoil energy E R ∈ [3,24] GeV.…”

Section: B Miniboone-dmmentioning

confidence: 99%

Dark sector-photon interactions in proton-beam experiments

2020

View full text Add to dashboard Cite

We consider electromagnetically neutral dark states that couple to the photon through higher dimensional effective operators, such as electric and magnetic dipole moment, anapole moment and charge radius operators. We investigate the possibility of probing the existence of such dark states, taking a Dirac fermion χ as an example, at several representative proton-beam experiments. As no positive signal has been reported, we obtain upper limits (or projected sensitivities) on the corresponding electromagnetic form factors for dark states lighter than several GeV. We demonstrate that while the current limits from proton-beam experiments are at most comparable with those from high-energy electron colliders, future experiments, such as DUNE and SHiP, will be able to improve the sensitivities to electric and magnetic dipole moment interactions, owing to their high intensity.

show abstract

Section: B Miniboone-dmmentioning

confidence: 99%

Dark sector-photon interactions in proton-beam experiments

2020

View full text Add to dashboard Cite

show abstract

“…The dissipative dynamics present in the (XC) model could also allow the formation of dense dark matter clouds [60] where dark matter annihilation would be enhanced, hence potentially leading to indirect detection signatures within gamma-ray telescopes if a portal between the SM and the dark sector exists. Dissipation within the dark sector could also lead to the formation of black holes [61].…”

Section: Distinctive Features Of the Modelmentioning

confidence: 99%

“…For instance, frequent scattering between dark matter and dark photons has the potential to damp the growth of matter structure [15,28,[46][47][48][49][50][51] on small scales, affecting the spectrum of cosmic microwave background (CMB) anisotropies [28,52,53] and leading to a suppressed number of satellites orbiting typical galaxies today. In addition, the presence of a light particle coupled to the massless dark photon can provide a channel for dark matter to shed energy and momentum [35,36,51,[54][55][56][57][58][59][60][61] allowing for the formation of dense dark matter objects such as disks [62,63]. Moreover, the dark matter self-interactions that are inherent to these U (1)-charged models can lead to halo evaporation [64].…”

Section: Introductionmentioning

confidence: 99%

Dark catalysis

Agrawal

Cyr-Racine

Randall

et al. 2017

J. Cosmol. Astropart. Phys.

Self Cite

109

View full text Add to dashboard Cite

Abstract.Recently it was shown that dark matter with mass of order the weak scale can be charged under a new long-range force, decoupled from the Standard Model, with only weak constraints from early Universe cosmology. Here we consider the implications of an additional charged particle C that is light enough to lead to significant dissipative dynamics on galactic times scales. We highlight several novel features of this model, which can be relevant even when the C particle constitutes only a small fraction of the number density (and energy density). We assume a small asymmetric abundance of the C particle whose charge is compensated by a heavy X particle so that the relic abundance of dark matter consists mostly of symmetric X andX, with a small asymmetric component made up of X and C. As the universe cools, it undergoes asymmetric recombination binding the free Cs into (XC) dark atoms efficiently. Even with a tiny asymmetric component, the presence of C particles catalyzes tight coupling between the heavy dark matter X and the dark photon plasma that can lead to a significant suppression of the matter power spectrum on small scales and lead to some of the strongest bounds on such dark matter theories. We find a viable parameter space where structure formation constraints are satisfied and significant dissipative dynamics can occur in galactic haloes but show a large region is excluded. Our model shows that subdominant components in the dark sector can dramatically affect structure formation.

show abstract

“…Furthermore, subhalos of the size predicted here would appear as point sources and could give a DM explanation [23] to the unidentified point sources observed by FERMI-LAT [24][25][26].…”

Section: Present-day Substructurementioning

confidence: 96%

Concentrated dark matter: Enhanced small-scale structure from codecaying dark matter

et al. 2018

View full text Add to dashboard Cite

We study the cosmological consequences of codecaying dark matter-a recently proposed mechanism for depleting the density of dark matter through the decay of nearly degenerate particles. A generic prediction of this framework is an early dark matter dominated phase in the history of the Universe, that results in the enhanced growth of dark matter perturbations on small scales. We compute the duration of the early matter dominated phase and show that the perturbations are robust against washout from free streaming. The enhanced small-scale structure is expected to survive today in the form of compact microhalos and can lead to significant boost factors for indirect-detection experiments, such as FERMI, where dark matter would appear as point sources.

show abstract

Point sources from dissipative dark matter

Cited by 30 publications

References 142 publications

Dark sector-photon interactions in proton-beam experiments

Dark sector-photon interactions in proton-beam experiments

Dark catalysis

Concentrated dark matter: Enhanced small-scale structure from codecaying dark matter

Contact Info

Product

Resources

About