Speaker
Mr
Varun Vaidya
(Carnegie Mellon University)
Description
We systematically compute the annihilation rate for neutral winos into the
final state $\gamma + X$, including all leading radiative corrections.
This includes both the Sommerfeld enhancement (in the decoupling limit for
the Higgsino) and the resummation of the leading electroweak double
logarithms. Adopting an analysis of the HESS experiment, we place
constraints on the mass as a function of the wino fraction of the dark
matter and the shape of the dark matter profile. We also determine how
much coring is needed in the dark matter halo to make the wino a viable
candidate as a function of its mass. Additionally, as part of our
effective field theory formalism, we show that in the pure-Standard Model
sector of our theory, emissions of soft Higgses are power-suppressed and
that collinear Higgs emission does not contribute to leading double logs.
Primary author
Mr
Varun Vaidya
(Carnegie Mellon University)
