Aug 13 – 16, 2019
Kane Hall 225
US/Pacific timezone

Improved constraints on a t-channel simplified model of Majorana Dark matter

Aug 13, 2019, 4:50 PM
Walker-Ames (Kane Hall 225)


Kane Hall 225


Kirtimaan Mohan (Michigan State University)


An interesting class of models posits that the dark matter is a Majorana
fermion which interacts with a quark together with a colored scalar mediator. Such a
theory can be tested in direct detection experiments, through dark matter scattering
with heavy nuclei, and at the LHC, via jets and missing energy signatures. Motivated
by the fact that such theories have spin-independent interactions that vanish at tree
level, we examine them at one loop (along with RGE improvement to resum large
logs), and find that despite its occurrence at a higher order of perturbation theory,
the spin-independent scattering searches typically impose the strongest constraints on
the model parameter space. We further analyze the corresponding LHC constraints
at one loop and find that it is important to take them into account when interpreting
the implications of searches for jets plus missing momentum on this class of models,
thus providing the corresponding complementary information for this class of models.

Primary author

Kirtimaan Mohan (Michigan State University)


Tim M.P. Tait (University of California, Irvine) Bin Yan C.-P. Yuan (Michigan State University) dipan sengupta

Presentation materials