TY  - JOUR
AU  - De Romeri, V.
AU  - Kim, J. S.
AU  - Martin Lozano, V.
AU  - Rolbiecki, K.
AU  - Ruiz de Austri, R.
PY  - 2016
DA  - 2016//
TI  - Confronting dark matter with the diphoton excess from a parent resonance decay
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 262 - 13pp
VL  - 76
IS  - 5
PB  - Springer
AB  - A diphoton excess with an invariant mass of about 750 GeV has been recently reported by both ATLAS and CMS experiments at LHC. While the simplest interpretation requires the resonant production of a 750 GeV (pseudo) scalar, here we consider an alternative setup, with an additional heavy parent particle which decays into a pair of 750 GeV resonances. This configuration improves the agreement between the 8 and 13 TeV data. Moreover, we include a dark matter candidate in the form of a Majorana fermion which interacts through the 750 GeV portal. The invisible decays of the light resonance help to suppress additional decay channels into Standard Model particles in association with the diphoton signal. We realise our hierarchical framework in the context of an effective theory, and we analyse the diphoton signal as well as the consistency with other LHC searches. We finally address the interplay of the LHC results with the dark matter phenomenology, namely the compatibility with the relic density abundance and the indirect detection bounds.
SN  - 1434-6044
UR  - http://arxiv.org/abs/1603.04479
UR  - https://doi.org/10.1140/epjc/s10052-016-4116-7
DO  - 10.1140/epjc/s10052-016-4116-7
LA  - English
N1  - WOS:000399931700001
ID  - DeRomeri_etal2016
ER  -