Search for anomalous couplings ateγ colliders

Abstract

We consider the possibility of observing deviations from the standard model gauge-boson self-couplings at future e\ensuremath{\gamma} colliders. We concentrate on the process ${\mathit{e}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\gamma}\ensuremath{\rightarrow}\ensuremath{\nu}${\mathit{W}}^{\mathrm{\ensuremath{-}}}$Z, which is particularly sensitive to the parity-violating coupling ${\mathit{g}}_{5}^{\mathit{Z}}$ at high energies. We find that a 2 TeV ${\mathit{e}}^{+}$${\mathit{e}}^{\mathrm{\ensuremath{-}}}$ collider operating in the ${\mathit{e}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\gamma} mode could reach a sensitivity of order 5\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}3}$ to ${\mathit{g}}_{5}^{\mathit{Z}}$.

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