Speaker: 
Sacha Davidson
Speaker affiliation: 
IPNL, Universite' de Lion
Date: 
Friday, March 28, 2014 - 13:15
Room: 
Building 67 (Nursing) 1003
Title: 
Dark Matter, Effective Field Theory, and the LHC
Abstract: 

The interactions of Dark Matter with nucleons can be probed
at the MeV scale in Direct Detection experiments, and at the
TeV scale at the LHC. If the dark matter is the only new
particle below the TeV, then its interactions with the
Standard Model can be parametrised by contact interactions.
"Monojet" searches at the LHC have been used to set
bounds on contact interactions between dark matter
and quarks, and it is sometimes said that these bounds
preclude the detection of dark matter in
spin-dependent direct detection experiments.
However, in an Effective Field Theory parametrisation
of unknown new physics, contact interactions between
the dark matter and the Higgs or $Z$ should also be allowed for,
and these contribute differently at colliders from at low energy.
This suggests that the LHC and direct detection experiments are complementary,
being sensitive to different combinations of
interactions.