17-22 July 2016
Master Cutlers Hall
Europe/London timezone

Unitarisation of EFT Amplitudes for Dark Matter Searches at the LHC

20 Jul 2016, 14:20
20m
Venue: Cutlers' Drawing Room (First Floor); Chair: Malcolm Fairbairn; Session Manager: Anthony Ezeribe ()

Venue: Cutlers' Drawing Room (First Floor); Chair: Malcolm Fairbairn; Session Manager: Anthony Ezeribe

Speaker

Michael Schmidt (The University of Sydney)

Description

We propose a new approach to the LHC dark matter search analysis within the effective field theory (EFT) framework by utilising the K-matrix unitarisation formalism. This approach provides a reasonable estimate of the dark matter production cross section at high energies and hence allows to put reliable bounds on the cut-off scale of relevant operators without running into the problem of perturbative unitarity. We exemplify this procedure for the effective operator D5 in monojet searches of dark matter in the collinear approximation. We compare our bounds to those obtained using the trunca- tion method and identify a region of parameters where the unitarisation prescription leads to more stringent bounds.

Primary authors

Archil Kobakhidze (The University of Sydney) David Long (The University of Sydney) Giorgio Busoni (The University of Melbourne) Michael Schmidt (The University of Sydney) Nicole Bell (The Unversity of Melbourne)

Presentation Materials

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now

×