A feebly interacting dark matter particle can become a pseudo-FIMP by staying in equilibrium through conversion with a strongly self-interacting SIMP partner; the paper demonstrates this with coupled Boltzmann equations and a two-scalar example.
Absolute Lower Limits on the Masses of Selectrons and Sneutrinos in the MSSM
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abstract
The results of searches for selectrons, charginos and neutralinos performed with the data collected by the ALEPH detector at LEP at centre-of-mass energies up to 209 GeV are interpreted in the framework of the Minimal Supersymmetric extension of the Standard Model with R-parity conservation. Under the assumptions of gaugino and sfermion mass unification and no sfermion mixing, an absolute lower limit of 73 GeV/c2 is set on the mass of the lighter selectron at the 95% confidence level. Similarly, limits on the masses of the heavier selectron and of the sneutrino are set at 107 and 84 GeV/c2, respectively. Additional constraints are derived from the results of the searches for Higgs bosons. The results are also interpreted in the framework of minimal supergravity.
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Pseudo-FIMP dark matter in presence of a SIMP
A feebly interacting dark matter particle can become a pseudo-FIMP by staying in equilibrium through conversion with a strongly self-interacting SIMP partner; the paper demonstrates this with coupled Boltzmann equations and a two-scalar example.