REVIEW 4 cited by
Early kinetic decoupling of dark matter: when the standard way of calculating the thermal relic density fails
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
read the original abstract
Calculating the abundance of thermally produced dark matter particles has become a standard procedure, with sophisticated methods guaranteeing a precision that matches the percent-level accuracy in the observational determination of the dark matter density. Here, we point out that one of the main assumptions in the commonly adopted formalism, namely local thermal equilibrium during the freeze-out of annihilating dark matter particles, does not have to be satisfied in general. We present two methods for how to deal with such situations, in which the kinetic decoupling of dark matter happens so early that it interferes with the chemical decoupling process: i) an approximate treatment in terms of a coupled system of differential equations for the leading momentum moments of the dark matter distribution, and ii) a full numerical solution of the Boltzmann equation in phase-space. For illustration, we apply these methods to the case of Scalar Singlet dark matter. We explicitly show that even in this simple model the prediction for the dark matter abundance can be affected by up to one order of magnitude compared to the traditional treatment.
Forward citations
Cited by 4 Pith papers
-
Conversions in two-component dark sectors: a phase space level analysis
In the double Coy dark matter model, full phase-space Boltzmann evolution with conversions changes relic abundances by up to an order of magnitude per component and by more than 100% for the total in some parameter regions.
-
Light Vector Dark Matter via a Magnetic Dipole Portal: Bridging Direct Detection and Fixed-Target Searches
A sub-GeV vector DM model with a magnetic dipole portal is studied at LDMX/NA64, but the claimed viable region relies on an unjustified thermal equilibrium assumption.
-
Probing the Phenomenology of Dark Matter from Decoupled Freeze-Out
In a scalar-plus-pseudoscalar mediator model, decoupled freeze-out can produce the observed dark matter relic density via s-wave annihilation while evading CMB limits, though indirect-detection and BBN bounds leave on...
-
Freezing-in Cannibals with Low-reheating Temperature
Non-instantaneous (low-temperature) reheating combined with 3-to-2 cannibal self-interactions reshapes the freeze-in dark matter parameter space and opens new light-DM regions for future colliders.
Discussion (0). Continue with ORCID to comment.