CERN LHC sensitivity on measuring W±Zγ production and anomalous WWZγ coupling

In this paper we present for the first time a detailed Monte Carlo study of measuring W +/- Z gamma production with pure leptonic decays and probing anomalous quartic gauge-boson WWZ gamma couplings at the root s = 14 TeV LHC, with parton shower and detector simulation effects taken into account. We find that with an integrated luminosity of 100 fb(-1) and proper selection cuts, the Standard Model W +/- Z gamma signal significance can be improved to as much as 3 sigma. After reviewing previous parametrizations on anomalous WWZ gamma couplings [see e.g. a(n)/Lambda(2) or k(2)(m)/Lambda(2) as shown in Belanger et al. Eur. Phys. J. C 13, 283 (2000)], we propose a more general parametrization scheme with four free inputs leading only to genuine WWZ gamma aQGC couplings. Finally, our numerical results show that one can reaches constraints at 95% confidence level of -5.7 X 10(-5) GeV-2 < k(2)(m)/Lambda(2) < 5.5 X 10(-5) GeV-2 and -2.2 X 10(-5) GeV-2 < a(n)/Lambda(2) < 2.4 X 10(-5) GeV-2, which are more stringent than LEP's results by three orders of magnitude.