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A scalar hint from the diboson excess?

Abstract : In view of the recent diboson resonant excesses reported by both ATLAS and CMS, we suggest that a new weak singlet pseudo-scalar particle, $\eta_{WZ}$, may decay into two weak bosons while being produced in gluon fusion at the LHC. The couplings to gauge bosons can arise as in the case of a Wess-Zumino-Witten anomaly term, thus providing an effective model in which the present observed excess in the diboson channel at the LHC can be studied in a well motivated phenomenological model. In models where the pseudo-scalar arises as a composite state, the coefficients of the anomalous couplings can be related to the fermion components of the underlying dynamics. We provide an example to test the feasibility of the idea.
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Contributor : Sylvie Flores <>
Submitted on : Thursday, July 16, 2015 - 10:42:59 AM
Last modification on : Friday, September 10, 2021 - 1:50:06 PM

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G. Cacciapaglia, A. Deandrea, M. Hashimoto. A scalar hint from the diboson excess?. Physical Review Letters, American Physical Society, 2015, 115, pp.171802. ⟨10.1103/PhysRevLett.115.171802⟩. ⟨in2p3-01176887⟩



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