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arXiv · hep-ph/9701255

Energy Spectrum of Leptons from $e^+e^- \to W^+W^-$ in the Presence of Strong W^+_LW^-_L Interaction

Anja Werthenbach·L. M. Sehgal
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Abstract

The energy spectrum of leptons, produced by the decay of one or both W's in the reaction $e^+e^- \to W^+W^-$, is a significant probe of the helicity structure of this process. We calculate the energy spectrum $d σ/d E$ of a single decay lepton, as well as the two-dimensional energy distribution $d σ/d E_+dE_-$. We then consider a possible strong final state interaction in the longitudinally polarized state of the W^+W^- system, parametrized by a ρ-like resonance in the region of 1.8 TeV. We show that such a resonance produces measurable effects in the lepton spectrum at $\sqrt{s}=500$ GeV. The results are compared with those obtained from a non-resonant interaction approximated by a phase factor $e^{i δ}$ in the l=1 part of the W^+_LW^-_L amplitude.

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Anja Werthenbach, L. M. Sehgal. 1997-01-09. Energy Spectrum of Leptons from $e^+e^- \to W^+W^-$ in the Presence of Strong W^+_LW^-_L Interaction. https://doi.org/10.1016/s0370-2693(97)00432-2

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