Speaker
Giorgio Busoni
Description
We discuss the limitations to the use of the effective field theory approach to study dark matter at the LHC. We introduce and study a few quantities, which quantify the error made when using effective operators to describe processes with very high momentum transfer. Firstly, we study the full list of operators connecting fermion DM to
quarks and gluons, corresponding to integrating out a heavy mediator in the s-channel; secondly, we provide analytical results for the validity of the EFT description for both \sqrt{s}=8 TeV and 14 TeV; thirdly, we make
use of a MonteCarlo event generator approach to assess the validity of our analytical conclusions. We apply our
results to revisit the current collider bounds on the ultraviolet cut-off scale of the effective field theory and show that these bounds are weakened once the validity conditions of the effective field theory are imposed.
Primary author
Giorgio Busoni
