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Search for heavy resonances decaying to a Z boson and a photon in pp collisions at root s=13 TeV with the ATLAS detector

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Figure

Fig. 1.√pp collisions. All selection requirements have been applied. The blue solid (red dashed) line represents the fit of Z simulation of a narrow resonance Invariant-mass distribution for X →γ, Z → ℓℓ (solid circles) or Z → qq¯ events (open squares) in a X with a mass of 800 GeV produced in a gluon-fusion process ins = 13 TeVthe points with a double-sided Crystal Ball function (sum of a Crystal Ball function and a Gaussian function).
Fig. 2. Ewhich theevents in whichan interpolation with a smooth function (of the typefficiency (including the acceptance of the kinematic criteria) of the leptonic selection for simulated signal Z bosons decay to ℓℓ (solid circles), and of the hadronic selec
Fig. 3. Distribution of the reconstructedor muon pairs, or (b) to hadrons reconstructed as a single, large-radius jet
Fig. 4. Observed (solid lines) and median expected (dashed lines) 95% CL limits on the product of the productioncross section times the branching ratio of a narrow scalar boson X decaying to a Z boson and a photon, σ(pp →X) × BR(X → Zγ), as a function of t

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