The LHC diphoton resonance and dark matter
Abstract
A Higgs-like resonance with a mass of approximately 750 GeV has recently been observed at the LHC in its diphoton decay. If this state is not simply a statistical fluctuation which will disappear with more data, it will have important implications not only for particle physics but also for cosmology. In this note, we analyze the implications of such a resonance for the dark matter (DM). Assuming a spin 1/2 DM particle, we first verify that indeed the correct relic density can be obtain for a wide range of the particle mass and weak scale coupling that are compatible with present data. We then show that the combination of near future direct and indirect detection experiments will allow to probe the CP-nature of the mediator resonance, i.e. check whether it is a scalar or a pseudoscalar like particle.
Keywords
Cite
@article{arxiv.1512.04913,
title = {The LHC diphoton resonance and dark matter},
author = {Yann Mambrini and Giorgio Arcadi and Abdelhak Djouadi},
journal= {arXiv preprint arXiv:1512.04913},
year = {2016}
}
Comments
9 pages, 5 figures, typos corrected, text improved, reference added and analysis extended by one more scenario; conclusions unchanged