Author:
Dutta Koushik,Ghosh Avirup,Kar Arpan,Mukhopadhyaya Biswarup
Abstract
Abstract
We consider a weakly interacting massive
particle (WIMP) dark matter (DM) annihilating into
all possible Standard Model (SM) particle pairs,
including the SM neutrinos, via s-wave processes and
derive the branching ratio independent upper limit
on the total annihilation cross-section
〈σv〉 using the data of
CMB, gamma-ray, cosmic-ray and several neutrino
observations. For conservative choices of all relevant
astrophysical parameters, we obtain upper limits
of 10-23–10-25 cm3 s-1
on the total 〈σv〉 for the WIMP mass
range 10 MeV–100 TeV, thus making the
entire mass range consistent with the observed relic density.
An important input that goes into our analysis
is the assumption that thermal WIMPs can
have significant coupling to the SM neutrinos.
Subject
Astronomy and Astrophysics