We show that the 750 GeV di-photon excess could be explained by the Q−onium system of a new QCD-like theory with fermions vectorial under the SM. Beside the spin-0 di-photon singlet this scenario predicts almost degenerate colored scalars and spin-1 resonances analogous to the J/Ψ in QCD. All these states are within the reach of the LHC. An apparent large width can be explained as due to production of excited states with splitting Δm∼Γ.
@article{arxiv.1603.07719,
title = {Back to 1974: The $\mathcal Q$-onium},
author = {Jernej F. Kamenik and Michele Redi},
journal= {arXiv preprint arXiv:1603.07719},
year = {2016}
}
Comments
6 pages. v2: QCD effects and splitting of SU(2) multiplets added. v3: final version to appear in PLB