Unravelling the $WW\gamma$ and $WWZ$ Vertices at the Linear Collider: $\bar{\nu }\nu \gamma$ and $\bar{\nu }\nu \bar{q}q$ final states

Abstract

We perform a detailed analysis of the processes $e^{+}{e}^{-}\to \bar{\nu }\nu \gamma$ and $\bar{\nu }\nu \bar{q}q$ at future linear $e^{+}{e}^{-}$ colliders and assess their sensitivity to anomalous gauge boson couplings. We consider center of mass energies $\sqrt{s}=$ 350, 500 and 800 GeV. We demonstrate that significant improvements can be obtained if the phase space information for the cross sections is used maximally. At 800 GeV the parameters $\Delta {\kappa }_{\gamma }$ and ${\lambda }_{\gamma }$ can be constrained, at 95\% CL, to about 0.02 and 0.01, while the parameters $\Delta {\kappa }_Z$, ${\lambda }_Z$ and $\Delta g_1^Z$ can be probed down to about 0.009, 0.002 and 0.004 respectively. The precision of these measurements is likely to be limited by statistical errors at anticipated luminosities at these energies.

LaTeX, 16 pages, 7 figs (embedded)

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• Physics with e^+e^- Linear Colliders
• CP-violating Anomalous $WW\gamma$ Couplings in e^+e^- Collisions
• Unravelling the anomalous gauge boson couplings in $Z{W}^{\pm }$ production at the LHC and the role of spin-$1$ polarizations
• On the phenomenology of a Z' coupling only to third-family fermions
• Probing the anomalous triple gauge boson couplings in $e^{+}{e}^{-}\to W^{+}{W}^{-}$ using $W$ polarizations with polarized beams
• Model independent study for the anomalous $W^{+}{W}^{-}\gamma$ couplings at the future lepton-hadron colliders
• Role of polarizations and spin-spin correlations of $W^{\prime }s$ in $e^{-}{e}^{+}\to W^{-}{W}^{+}$ at $\sqrt{s}=250$ GeV to probe anomalous $W^{-}{W}^{+}Z/\gamma$ couplings
• Search for the anomalous $WW\gamma$ couplings through the process $e^{-}{e}^{+}\to {\nu }_e{\bar{\nu }}_e\gamma$ at ILC with unpolarized and polarize beams
• Forward-backward asymmetry in e+e- -> nu nubar Z from anomalous CP-odd WWZ couplings
• Optimal sensitivity of anomalous charged triple gauge couplings through $W$ boson helicity at the $e^{+}{e}^{-}$ colliders