title: Scalar Hint from the Diboson Excess?
abstract: In view of the recent diboson resonant excesses reported by both ATLAS and CMS Collaborations, we suggest that a new weak singlet pseudoscalar particle η(WZ) may decay into two weak bosons while being produced in gluon fusion at the LHC. The couplings to the gauge bosons can arise from a Wess-Zumino-Witten anomaly term and thus we study an effective model based on the anomaly term as a well motivated phenomenological model. In models where the pseudoscalar particle 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.
authors.affiliation: Université de Lyon, France; Université Lyon 1, Villeurbanne, France; CNRS/IN2P3, UMR5822, IPNL F-69622 Villeurbanne Cedex, France.
authors.forename: Giacomo
authors.initials: G
authors.lastname: Cacciapaglia
authors.affiliation: Université de Lyon, France; Université Lyon 1, Villeurbanne, France; CNRS/IN2P3, UMR5822, IPNL F-69622 Villeurbanne Cedex, France.|Institut Universitaire de France, 103 boulevard Saint-Michel, 75005 Paris, France.
authors.forename: Aldo
authors.initials: A
authors.lastname: Deandrea
authors.affiliation: Chubu University, 1200 Matsumoto-cho, Kasugai-shi, Aichi 487-8501, Japan.
authors.forename: Michio
authors.initials: M
authors.lastname: Hashimoto