Re-opening dark matter windows compatible with a diphoton excess
- Laboratoire de Physique Théorique, CNRS, Univ. Paris-Sud,Université Paris-Saclay, 91405 Orsay (France)
We investigate a simple setup in which an excess in the di-photon invariant mass distribution around 750 GeV, as seen by the ATLAS and CMS collaborations, is originated through a pair of collimated photon pairs. In this framework a scalar state s decays into two light pseudo-Goldstone bosons a, each of which subsequently decays into a pair of collimated photons which are misidentified as a single photon. In a minimal context of spontaneous symmetry breaking, we show that coupling a complex scalar field Φ=(s+ia)/√2 to a fermionic dark matter candidate χ, also responsible for generating its mass, allows for the correct relic density in a large region of the parameter space, while not being excluded by the direct or indirect detection experiments. Moreover, the correct relic abundance can naturally co-exist with a relatively large width for the resonant field s.
- Sponsoring Organization:
- SCOAP3, CERN, Geneva (Switzerland)
- OSTI ID:
- 22572111
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 07; Other Information: PUBLISHER-ID: JCAP07(2016)005; OAI: oai:repo.scoap3.org:16298; cc-by Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATLAS DETECTOR
CERN LHC
CMS DETECTOR
COSMOLOGY
FERMIONS
GEV RANGE 100-1000
GOLDSTONE BOSONS
MASS DISTRIBUTION
NONLUMINOUS MATTER
PARTICLE DECAY
PHOTONS
RADIATION DETECTION
RELICT RADIATION
SCALAR FIELDS
SYMMETRY BREAKING