Abstract
Diphoton channel provides a clean signature in searches for new physics. In this paper, we discuss a connection between the diphoton channel (γγ) and triboson channels (Zγγ, ZZγ, WWγ) imposed by the SU(2)L×U(1)Y symmetry of the Standard Model (SM) in certain classes of models. To illustrate this idea we choose a simple model that has all these channels. In this model, the same physics can give rise to γ+MET instead of γγ and 2 bosons plus missing energy instead of 3-boson channels. We analyze existing constraints and previous searches and show that channels WWγ and especially Zγ+MET have a potential to discover new physics at the LHC.
Highlights
A diphoton signal is a good signature in the searches for new physics at the LHC [1,2,3,4] and possible future colliders, for example, the ILC [5] or the FCC [6]
We discuss the connection between the diphoton channel (γ γ ) and the three-boson channels ( Z γ γ, Z Z γ, W W γ ) that is imposed by the SU (2)L × U (1)Y symmetry of the Standard
We discussed the triboson channels as a potential signature of new physics at the LHC and analyze the corresponding sensitivity. Since such searches have not been performed at the LHC we can not provide a sensitivity projection by reinterpreting an experimental analysis, but instead we make estimates based on similar signatures
Summary
A diphoton signal is a good signature in the searches for new physics at the LHC [1,2,3,4] and possible future colliders, for example, the ILC [5] or the FCC [6]. We discuss the connection between the diphoton channel (γ γ ) and the three-boson channels ( Z γ γ , Z Z γ , W W γ ) that is imposed by the SU (2)L × U (1)Y symmetry of the Standard. The three-boson channels are interesting from experimental point of view because of low background and high detection efficiency [14,15,16,17,18]. To illustrate this idea, we consider the specific axion-like particle model [19].
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