Speaker
Nikita Blinov
(TRIUMF)
Description
Collider constraints on Standard Model superpartners point to a split spectrum with gauginos much lighter than the scalars. Such spectra are typical of Anomaly Mediated Supersymmetry Breaking (AMSB), which also predicts the lightest supersymmetric particle to be the wino. If stable, the wino can be an attractive dark matter candidate. Unfortunately, its self annihilation rate in the present universe is in severe conflict with observations from the Fermi-LAT and HESS experiments. Their constraints on gamma ray line and continuum fluxes rule out wino dark matter and therefore AMSB-type spectra for a wide range of parameters. We investigate extensions of the Minimal Supersymmetric Standard Model that allow low scale supersymmetry accessible by direct searches, while being consistent with astrophysical and cosmological probes. The tension with indirect searches is most easily relieved by allowing the wino to decay into new stable states that play the role of dark matter. We demonstrate the viability of this scenario in models with light hidden sectors, and with asymmetric dark matter.
Authors
Dr
Arjun Menon
(University of Oregon)
Dr
David Morrissey
(TRIUMF)
Dr
Jonathan Kozaczuk
(TRIUMF)
Nikita Blinov
(TRIUMF)
