Prospects for indirect MeV dark matter detection with gamma rays in light of cosmic microwave background constraints

González‐Morales, Alma X.; Profumo, Stefano; Reynoso-Cordova, Javier

doi:10.1103/physrevd.96.063520

Cited by 15 publications

(13 citation statements)

References 53 publications

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“…The anni-hilation cross-section today drives gamma-ray signals, whereas the thermal averaged annihilation cross-section at CMB decoupling drives CMB constraints. Some dark matter models feature velocity-dependent annihilation rates, and in these models the assessment of which experiment is the most restrictive is model-dependent [138][139][140][141][142][143][144]. Here, we have highlighted that bounds on the dark matter annihilation cross-section do not depend on specific particle physics models and in this respect they can be regarded as model-independent.…”

Section: Discussionmentioning

confidence: 93%

Searching for secluded dark matter with H.E.S.S., Fermi-LAT, and Planck

Profumo

Queiroz

Silk

et al. 2018

J. Cosmol. Astropart. Phys.

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Short-lived mediators are often used to describe dark matter interactions with Standard Model particles. When the dark matter mass is heavier than the mass of the mediator, it may self-annihilate into short-lived mediators, and in some cases this might be the dominant annihilation channel. This scenario is known as secluded dark matter. We use Fermi-LAT observations of dwarf spheroidal galaxies, H.E.S.S. data from the Galactic center, and Planck measurements of the Cosmic Microwave Background to constrain secluded dark matter. We explore the interplay between these experiments and we assess the impact of the mediator mass on our bounds, an often overlooked yet very important point. In particular, we exclude pair -annihilation cross-sections greater or on the order of σv ∼ 4 × 10 −27 cm 3 /s for dark matter masses around 10 GeV and greater or on the order of σv ∼ ×10 −25 cm 3 /s for dark matter masses around a TeV. Our findings supersede previous constraints which use Fermi-LAT data, and constitute the first limits on secluded dark sectors using the H.E.S.S. telescope. We also show that one can fit TeV gamma-ray observations from H.E.S.S. with secluded dark matter annihilations, with the mediator mass impacting the best-fit dark matter particle mass. Our findings indicate that any assessment of secluded dark sectors in the context of indirect detection significantly depends on the choice of the mediator mass. 1 4πσv 4.4 × 10 −25 cm 3 /s Planck CMB 4b, M DM = 100 GeV CMB 4b, M DM = 1 TeV M DM M V → σv 2.5 × 10 −25 cm 3 /s M DM M V → σv 3 × 10 −24 cm 3 /s M DM ∼ M V → σv 2.5 × 10 −25 cm 3 /s M DM ∼ M V → σv 2.5 × 10 −24 cm 3 /s CMB 4e, M DM = 100 GeV CMB 4e, M DM = 1 TeV M DM M V → σv 10 −25 cm 3 /s M DM M V → σv 10 −24 cm 3 /s M DM ∼ M V → σv 1.5 × 10 −25 cm 3 /s M DM ∼ M V → σv 1.5 × 10 −24 cm 3 /s

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Section: Discussionmentioning

confidence: 93%

Searching for secluded dark matter with H.E.S.S., Fermi-LAT, and Planck

Profumo

Queiroz

Silk

et al. 2018

J. Cosmol. Astropart. Phys.

Self Cite

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“…For energy range within ∼100 MeV and ∼ 1 GeV, we consider dark matter decay to neutral pions, photon-neutral pion, charged pions, and muons. These channels have been considered for the detection of dark matter through pair annihilation to gamma rays [59,60]. We use the electron, positron, and photon spectrum provided in the references [59,60].…”

Section: Dark Matter Decay To Standard Model Particlesmentioning

confidence: 99%

“…These channels have been considered for the detection of dark matter through pair annihilation to gamma rays [59,60]. We use the electron, positron, and photon spectrum provided in the references [59,60]. In Fig.…”

Section: Dark Matter Decay To Standard Model Particlesmentioning

confidence: 99%

CMB spectral distortions constraints on primordial black holes, cosmic strings and long lived unstable particles revisited

Acharya

Khatri

2020

J. Cosmol. Astropart. Phys.

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We calculate the spectral distortions from Hawking evaporation of primordial black holes before the epoch of recombination, taking into account emission of all standard model particles, including quark and gluons, and evolving the resulting particle cascades in the expanding Universe. We show that the constraints on the abundance of primordial black holes are stronger by more than an order of magnitude compared to the previous calculations which take only the primary photon emission into account. We also show that the shapes of the spectral distortions is different from the y or i-type distortions and are sensitive to the mass of the primordial black holes. We also extend previous constraints on the decay of long lived unstable particles before recombination to additional decay channels. We show that for dark matter mass 1 GeV, the spectral distortion shape is a function of the dark matter mass as well as the decay channel to standard model particles. We also provide new spectral distortion constraints on superconducting cosmic string decay. We explicitly show that consideration of emitted photon spectrum from string decay is not only important for the future experiments but also for already available COBE-FIRAS data.

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“…Dark matter particles with masses in the MeV range can generically produce detectable MeV gamma-ray signals that are compatible with existing constraints from BBN and CMB, as recently studied in, for example, Refs. [308][309][310] and in Ref. [311] in the context of dynamical dark matter models.…”

Section: E Complementaritymentioning

confidence: 99%

US Cosmic Visions: New Ideas in Dark Matter 2017 : Community Report

Feng

Fox

Dawson

et al. 2017

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Hall (Coordinator), 2 Roni Harnik (SAC member), 3 JoAnne Hewett (Coordinator), 9,8 Joseph Incandela (Coordinator), 10 Eder Izaguirre (WG3 Convener), 11 Daniel McKinsey (WG1 Convener), 12 Matthew Pyle (SAC member), 12 Natalie Roe (Coordinator), 13 Gray Rybka (SAC member), 14 Pierre Sikivie (SAC member), 15 Tim M.P. Tait (SAC member), 7 Natalia Toro (SAC co-chair), 9,16 Richard Van De Water (SAC member), 17 Neal Weiner (SAC member), 18 Kathryn Zurek (SAC member), 13,12

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Prospects for indirect MeV dark matter detection with gamma rays in light of cosmic microwave background constraints

Cited by 15 publications

References 53 publications

Searching for secluded dark matter with H.E.S.S., Fermi-LAT, and Planck

Searching for secluded dark matter with H.E.S.S., Fermi-LAT, and Planck

CMB spectral distortions constraints on primordial black holes, cosmic strings and long lived unstable particles revisited

US Cosmic Visions: New Ideas in Dark Matter 2017 : Community Report

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