A Randall-Sundrum graviton-mediated dark matter model with non-universal couplings can accommodate scalar, vector, fermion, and spin-3/2 dark matter while remaining consistent with relic density, direct detection, indirect detection, and LHC constraints.
Note on Spin-2 Particle Interpretation of the 750~GeV Diphoton Excess
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abstract
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. Similar results are obtained for the case in which the spin-2 particle induces large invisible decay branching ratios, as indicated by the ATLAS data.
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Dark matter in the Randall-Sundrum model
A Randall-Sundrum graviton-mediated dark matter model with non-universal couplings can accommodate scalar, vector, fermion, and spin-3/2 dark matter while remaining consistent with relic density, direct detection, indirect detection, and LHC constraints.