Radiation zeros in $W^+W^-\gamma$ production at high-energy colliders

W.J. Stirling; A. Werthenbach

doi:doi:10.1007/s100529900230

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2023 Impact factor 4.2

Particles and Fields

Eur. Phys. J. C 12, 441-450
DOI 10.1007/s100529900230

Radiation zeros in $W^+W^-\gamma$ production at high-energy colliders

W.J. Stirling^1,2 - A. Werthenbach¹

¹ Department of Physics, University of Durham, Durham DH1 3LE, UK
² Department of Mathematical Sciences, University of Durham, Durham DH1 3LE, UK

Received: 9 June 1999 / Revised version: 8 July 1999 / Published online: 21 December 1999

Abstract
The vanishing of the cross section for particular points in phase space - radiation zeros - is examined for the process $q \bar q \to W^+W^- \gamma$ at high energy. Unlike the process $q \bar q\, {'}\to W^\pm \gamma$ , actual zeros only occur in the soft-photon limit. However, for photon energies that are not too large, the cross section does exhibit deep dips in regions of phase space corresponding to the position of the actual zeros. We show that in these regions the sensitivity to possible anomalous quartic couplings is very large.