Probe of anomalous quartic WWZγWWZγ couplings in the photon-photon collisions

preprint2015arXivOpen access

Abstract

In this paper, we examine the potentials of the processes γγ→W+W−Zγγ\rightarrow W^{+} W^{-}Z and e+e−→e+γ∗γ∗e−→e+W+W−Ze−e^{+}e^{-} \rightarrow e^{+}γ^{*} γ^{*} e^{-} \rightarrow e^{+} W^{+} W^{-} Z e^{-} at the CLIC with s=0.5,1.5\sqrt{s}=0.5,1.5 and 33 TeV to investigate anomalous quartic WWZγWWZγ couplings by two different CP-violating and CP-conserving effective Lagrangians. We find 95%95\% confidence level limits on the anomalous coupling parameters at the three CLIC energies and various integrated luminosities. The best limits obtained from the process γγ→W+W−Zγγ\rightarrow W^{+} W^{-}Z on the anomalous k0WΛ2\frac{k_{0}^{W}}{Λ^{2}}, kcWΛ2\frac{k_{c}^{W}}{Λ^{2}} and k2mΛ2\frac{k_{2}^{m}}{Λ^{2}} couplings defined by CP-conserving effective Lagrangians are [−1.73; 1.73]×10−7[-1.73;\, 1.73]\times 10^{-7} GeV−2^{-2}, [−2.44; 2.44]×10−7[-2.44;\, 2.44]\times 10^{-7} and [−1.89; 1.89]×10−7[-1.89; \, 1.89]\times 10^{-7} GeV−2^{-2}, while anΛ2\frac{a_{n}}{Λ^{2}} coupling determined by CP-violating effective Lagrangians is obtained as [−1.74; 1.74]×10−7[-1.74;\, 1.74]\times 10^{-7} GeV−2^{-2}. In addition, the best limits derived on k0WΛ2\frac{k_{0}^{W}}{Λ^{2}}, kcWΛ2\frac{k_{c}^{W}}{Λ^{2}} and k2mΛ2\frac{k_{2}^{m}}{Λ^{2}} and anΛ2\frac{a_{n}}{Λ^{2}} from the process e+e−→e+γ∗γ∗e−→e+W+W−Ze−e^{+}e^{-} \rightarrow e^{+}γ^{*} γ^{*} e^{-} \rightarrow e^{+} W^{+} W^{-} Z e^{-} are obtained as [−1.09; 1.09]×10−6[-1.09;\, 1.09]\times 10^{-6} GeV−2^{-2}, [−1.54; 1.54]×10−6[-1.54;\, 1.54]\times 10^{-6} GeV−2^{-2}, [−1.18; 1.18]×10−6[-1.18;\, 1.18]\times 10^{-6} and [−1.04; 1.04]×10−6[-1.04;\, 1.04]\times 10^{-6} GeV−2^{-2}, respectively.

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