Do the Lyman-alpha forest and satellite galaxies favor a cutoff scale compatible with warm or ultralight dark matter?
Public summary of an internal test, not yet independently validated or published.
Question investigated
Do the Lyman-alpha forest and satellite galaxies favor a cutoff scale compatible with warm or ultralight dark matter?
Test conditions
The comparison uses approximations to published inferences on the cutoff scale, with cold dark matter as the reference. A joint conclusion requires appropriate treatment of one-sided limits and a significance correction for the parameter search.
Result
Approximations to the published summaries suggest a local preference for a cutoff scale. The result is sensitive, however, to converting one-sided limits into Gaussians. Without joint inference and a correction for the parameter search, no detection is established.
Physical interpretation
A preference for a cutoff scale does not by itself identify the dark-matter particle.