Revisiting big-bang nucleosynthesis constraints on dark-matter annihilation

Kawasaki, Masahiro; Kohri, Kazunori; Moroi, Takeo; Takaesu, Yoshitaro

doi:10.1016/j.physletb.2015.10.048

Cited by 45 publications

(42 citation statements)

References 52 publications

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“…A possible bound in this case can be obtained from the Big Bang Nucleosynthesis (BBN), since this process happens at T BBN ∼ MeV. As shown in References [54,55], the bounds on σv are generically weaker than those obtained from the CMB, and we have explicitly checked that in all the cases in which the CMB bound is ineffective, the BBN bound is also not relevant.…”

Section: Cmb Constraintsmentioning

confidence: 79%

Interplay of the LHC and non-LHC dark matter searches in the effective field theory approach

et al. 2019

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We present accurate and up-to-date constraints on the complete set of dimension five and six operators with scalar, fermion and vector Dark Matter (DM). We find limits using LHC mono-jet data, spin independent and spin dependent direct searches, relic density and CMB, and show the interplay between high and low energy data in setting bounds on the parameter space. In order to properly compare data taken at different energies, we take into account the effect of the running and mixing of operators. We also take into account the local density uncertainties affecting direct detection data, and apply EFT validity criteria related to the cut on the invariant mass of DM pair production at the LHC, which turns out to be especially important for the case of vector DM. Finally, we estimate the potential of the future LHC runs to probe DM parameter space.

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Section: Cmb Constraintsmentioning

confidence: 79%

Interplay of the LHC and non-LHC dark matter searches in the effective field theory approach

et al. 2019

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“…BBN also places stringent constraints on new physics beyond the Standard Model that injects energy into the cosmological plasma or influences the expansion rate at early times. This includes the decays of massive particles with lifetimes greater than τ ≃ 0.1 s [17,18,19,20,21,22,23,24,25,26,27,28,29,30], dark matter (DM) annihilation with an effective cross section near the critical value for thermal freeze-out [31,32,33,34], and any new thermalized species with mass below a few MeV [35,36,37,38].…”

Section: Introductionmentioning

confidence: 99%

Limits from BBN on light electromagnetic decays

Forestell

Morrissey

White

2019

J. High Energ. Phys.

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Injection of electromagnetic energy -photons, electrons, or positrons -into the plasma of the early universe can destroy light elements created by primordial Big Bang Nucleosynthesis (BBN). The success of BBN at predicting primordial abundances has thus been used to impose stringent constraints on decay or annihilation processes with primary energies near or above the electroweak scale. In this work we investigate the constraints from BBN on electromagnetic decays that inject lower energies, between 1-100 MeV. We compute the electromagnetic cascade from such injections and we show that it can deviate significantly from the universal spectrum commonly used in BBN calculations. For electron injection below 100 MeV, we find that the final state radiation of photons can have a significant impact on the resulting spectrum relevant for BBN. We also apply our results on electromagnetic cascades to investigate the limits from BBN on light electromagnetic decays prior to recombination, and we compare them to other bounds on such decays.

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“…the higgsino dark matter annihilation produces energetic hadrons during the big-bang nucleosynthesis(BBN) epoch, which affects the abundance of the light-elements. Such effect has been well studied in the literatures [74][75][76][77][78][79] and [79] shows that a limit on the dark matter annihilation cross section(only W + /W − channel) is around 2 × 10 −25 cm 3 /s for a 100 GeV dark matter and 2 × 10 −24 cm 3 /s for a 300 GeV dark matter. Such bound excludes a higgsino dark matter around 200 GeV.…”

Section: Higgsino Dm Searches From Bbn and Cmbmentioning

confidence: 99%

Higgsino dark matter in a non-standard history of the universe

Han

2019

Physics Letters B

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A light higgsino is strongly favored by the naturalness, while as a dark matter candidate it is usually under-abundant. We consider the higgsino production in a non-standard history of the universe, caused by a scalar field with an initially displaced vacuum. We find that given a proper reheating temperature induced by the scalar decay, a light higgsino could provide the correct dark matter relic abundance.On the other hand, a sub-TeV higgsino dark matter, once observed, would be a strong hint of the non-standard thermal history of the universe.

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Revisiting big-bang nucleosynthesis constraints on dark-matter annihilation

Cited by 45 publications

References 52 publications

Interplay of the LHC and non-LHC dark matter searches in the effective field theory approach

Interplay of the LHC and non-LHC dark matter searches in the effective field theory approach

Limits from BBN on light electromagnetic decays

Higgsino dark matter in a non-standard history of the universe

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