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2015

The 750 GeV diphoton excess at the LHC and dark matter constraints

Bi, Xiao-Jun, Xiang, Qian-Fei, Yin, Peng-Fei et al.

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The recent reported 750 GeV diphoton excess at the 13 TeV LHC is explained in the framework of effective field theory assuming the diphoton resonance is a scalar (pseudoscalar) particle.

It is found that the large production rate and the broad width of this resonance are hard to simultaneously explain if only visible final states are considered.
Therefore an invisible decay channel to dark matter (DM) is strongly favored by the diphoton excess with a broad width, given a large coupling of the new scalar to DM.
We set constraints on the parameter space in this scenario using the results from LHC Run 1, DM relic density, and DM direct and indirect detection experiments.

The 750 GeV diphoton excess at the LHC and dark matter constraints · Around

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