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2016

Note on Spin-2 Particle Interpretation of the 750~GeV Diphoton Excess

Geng, Chao-Qiang, Huang, Da

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We explore the possibility to explain the 750 GeV diphoton excess recently measured by ATLAS and CMS collaborations in terms of a massive spin-2 particle.

In particular, we consider the case in which the top-quark loops can give the similar amplitudes as the tree-level contributions to the diphoton and digluon channels.
Such a scenario can be naturally realized in the generalized warped extra dimension models.
As a result, the parameter space favored by the diphoton data implies that the top-quark loop contribution can compete to and even dominate over the tree-level amplitude in the spin-2 particle production via the gluon-gluon fusion process.

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