Speaker
David Tucker-Smith
(Williams College)
Description
In supersymmetric theories with right-handed neutrinos, new possibilities open up for
dark matter. I will discuss a scenario in which right-handed sneutrinos with weak-scale
masses mix with left-handed sneutrinos through weak-scale A terms. In this case the lightest
sneutrino mass eigenstate is a viable dark matter candidate. After discussing the constraints
on this model from requiring the correct relic abundance and from direct-detection experiments,
I will present an analysis of signatures of this scenario at the LHC. The NLSP typically decays
promptly, so the phenomenology is distinct from the recently studied case where the LSP
sneutrino is almost entirely right-handed. Possible signatures include dileptons
with a rather unusual invariant mass distribution, from cascades involving the decay of the
lightest neutralino, and Higgs or Z bosons from the decays of
the heavier sneutrinos to the lighter ones, produced in association with leptons.
Author
David Tucker-Smith
(Williams College)
Co-authors
Neal Weiner
(NYU)
Spencer Chang
(NYU)
