Eur. Phys. J. C (2015) 75: 436
https://doi.org/10.1140/epjc/s10052-015-3665-5

Regular Article - Theoretical Physics

Dark-matter production through loop-induced processes at the LHC: the s-channel mediator case

¹ Institute for Particle Physics Phenomenology (IPPP), Durham University, Durham, DH1 3LF, UK
² Centre for Cosmology, Particle Physics and Phenomenology (CP3), Université catholique de Louvain, 1348, Louvain-la-Neuve, Belgium

^* e-mail: evryonidou@gmail.com

Received: 12 August 2015
Accepted: 6 September 2015
Published online: 21 September 2015

Abstract

We show how studies relevant for mono-X searches at the LHC in simplified models featuring a dark-matter candidate and an s-channel mediator can be performed within the MadGraph5_aMC@NLO framework. We focus on gluon-initiated loop-induced processes, mostly relevant to the case where the mediator couples preferentially to third generation quarks and in particular to the top quark. Our implementation allows us to study signatures at hadron colliders involving missing transverse energy plus jets or plus neutral bosons (), possibly including the effects of extra radiation by multi-parton merging and matching to the parton shower.