# ICHEP2012

Jul 4 – 11, 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

## Detecting Dark Matter at the LHC with Electroweak Bremsstrahlung

Jul 7, 2012, 12:00 PM
15m
Room 216 (Melbourne Convention and Exhibition Centre)

### Room 216

#### Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 11. Particle Astrophysics and Cosmology

### Speaker

Mr Galea Ahmad (University of Melbourne (AU))

### Description

We investigate electroweak bremsstrahlung as a potential search channel for dark matter at the LHC. For illustrative purposes we consider a typical quarkphilic model with a Majorana dark matter candidate. We focus on the emission of a $Z$ boson from either the initial state particles or the internal propagator during annihilation of quarks into dark matter. Among the signatures of such processes will be a pair of high $p_T$ muons that reconstruct to the invariant mass of the $m_Z$, and large amounts of missing energy. We compare this signal to Standard Model backgrounds at the generator level, as a proof of principle for this search channel. We find that in certain regions of the model parameter space, up to 50% signal to background can be achieved, for 14TeV centre of momentum energy.

### Primary author

Mr Galea Ahmad (University of Melbourne (AU))

### Co-authors

Dr James Dent (Arizona State University) Prof. Lawrence Krauss (Arizona State University) Dr Nicole Bell (University of Melbourne) Dr Thomas Jacques (Arizona State University) Prof. Thomas Weiler (Vanderbilt University)

 Slides