期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 7, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2016/07/005
关键词
dark matter theory; particle physics - cosmology connection
资金
- Spanish MICINN's Consolider-Ingenio Programme [Multi-Dark CSD2009-00064, FPA2010-17747]
- France-US PICS [06482]
- LIA-TCAP of CNRS
- European Union [PITN-GA-2011- 289442]
- ERC
- P2IO Excellence Laboratory (LABEX)
- Research Executive Agency (REA) of the European Union [PITN-GA2012-316704]
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 Phi = (s + ia)/root 2 to a fermionic dark matter candidate chi, 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.
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