Search for new resonances in Wγ and Zγ final states in pp collisions at √s=8TeV with the ATLAS detector

This Letter presents a search for new resonances decaying to final states with a vector boson produced in association with a high transverse momentum photon, V γ , with V=W(→lν ) or Z ( → ll), where l =e or μ. The measurements use 20.3 fb^−1 of proton–proton collision data at a center-of-mass energy of √ s = 8TeV recorded with the ATLAS detector. No deviations from the Standard Model expectations are found, and production cross section limits are set at 95% confidence level. Masses of the hypothetical aT and ωT states of a benchmark Low Scale Technicolor model are excluded in the ranges [275,960] GeV and [200,700]∪[750,890]GeV, respectively. Limits at 95% confidence level on the production cross section of a singlet scalar resonance decaying to Zγ final states have also been obtained for masses below 1180 GeV.