Updated BBN constraints on electromagnetic decays of MeV-scale particles

Depta, Paul Frederik; Hufnagel, Marco; Schmidt-Hoberg, Kai

doi:10.1088/1475-7516/2021/04/011

Cited by 51 publications

(70 citation statements)

References 61 publications

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“…1. The lifetime of the mediator have a lower bound in the nano-second range from collider experiments [42] and upper limits from cosmological observations like BBN is 1 s [43,44]. These bounds are easily in consonance with the mediator considered here.…”

Section: Gamma Ray Fluxsupporting

confidence: 77%

Solar constraints on captured electrophilic dark matter

Bose,

Maity,

Ray

2021

Preprint

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Dark matter captured by interaction with electrons inside the Sun may annihilate via long-lived mediator to produce observable gamma ray signals. We utilize solar gamma ray flux measurements from the Fermi Large Area Telescope and High Altitude Water Cherenkov observatory to put bounds on the dark matter electron scattering cross-section. We find that our limits are four to six orders of magnitude stronger than the existing limits for dark matter masses ranging between GeV to PeV scale.

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Section: Gamma Ray Fluxsupporting

confidence: 77%

Solar constraints on captured electrophilic dark matter

Bose,

Maity,

Ray

2021

Preprint

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“…Another potential constraint comes from the requirement of successful primordial nucleosynthesis (BBN), which will in general be relevant for sufficiently light or sufficiently long-lived particles, see e.g. [50][51][52]. The dark Higgs h in particular can be very long-lived due to the extra Yukawa suppression of its couplings to light SM states.…”

Section: Jhep04(2021)146mentioning

confidence: 99%

Long-lived dark Higgs and inelastic dark matter at Belle II

Duerr

Garcia-Cely

Hearty

et al. 2021

J. High Energ. Phys.

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Inelastic dark matter is an interesting scenario for light thermal dark matter which is fully consistent with all cosmological probes as well as direct and indirect dark matter detection. The required mass splitting between dark matter χ1 and its heavier twin χ2 is naturally induced by a dark Higgs field which also provides a simple mechanism to give mass to the dark photon A′ present in the setup. The corresponding dark Higgs boson h′ is naturally the lightest dark sector state and therefore decays into Standard Model particles via Higgs mixing. In this work we study signatures with displaced vertices and missing momentum at Belle II, arising from dark Higgs particles produced in association with dark matter. We find that Belle II can be very sensitive to this scenario, in particular if a displaced vertex trigger is available in the near future.

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“…from the viewpoint of the big-bang nucleosynthesis (BBN) [98][99][100][101][102][103][104][105][106][107][108]. 11 This is the lower limit of the horizontal axis of figure 3.…”

Section: Jhep10(2021)026mentioning

confidence: 98%

Hidden photon and axion dark matter from symmetry breaking

Nakayama

Yin

2021

J. High Energ. Phys.

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A light hidden photon or axion-like particle is a good dark matter candidate and they are often associated with the spontaneous breaking of dark global or gauged U(1) symmetry. We consider the dark Higgs dynamics around the phase transition in detail taking account of the portal coupling between the dark Higgs and the Standard Model Higgs as well as various thermal effects. We show that the (would-be) Nambu-Goldstone bosons are efficiently produced via a parametric resonance with the resonance parameter q ∼ 1 at the hidden symmetry breaking. In the simplest setup, which predicts a second order phase transition, this can explain the dark matter abundance for the axion or hidden photon as light as sub eV. Even lighter mass, as predicted by the QCD axion model, can be consistent with dark matter abundance in the case of first order phase transition, in which case the gravitational wave signals may be detectable by future experiments such as LISA and DECIGO.

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Updated BBN constraints on electromagnetic decays of MeV-scale particles

Cited by 51 publications

References 61 publications

Solar constraints on captured electrophilic dark matter

Solar constraints on captured electrophilic dark matter

Long-lived dark Higgs and inelastic dark matter at Belle II

Hidden photon and axion dark matter from symmetry breaking

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