Contribution of the direct decay $φ\toπ^+ π^- γ$ to the process $e^+ e^- \to π^+ π^- γ$ at DA$Φ$NE

Details Contribution of the direct decay $φ\toπ^+ π^- γ$ to the process $e^+ e^- \to π^+ π^- γ$ at DA$Φ$NE Contribution of the direct decay $φ\toπ^+ π^- γ$ to the process $e^+ e^- \to π^+ π^- γ$ at DA$Φ$NE

2000-01-10

arxiv.org/abs/hep-ph/0001064v1

Phys.Lett. B477 (2000) 114-124

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 5 figures

Scientific paper

10.1016/S0370-2693(00)00209-4

The potential of DAPHNE to explore direct radiative decay $\phi \to \pi^+ \pi^- \gamma$ is studied in detail. Predictions of different theoretical models for this decay are compared. We find that it should be possible to discriminate between these models at DAPHNE in one year, even assuming a relatively low luminosity ${\cal{L}} = 10^{31} {\rm cm}^{-2} {\rm sec^{-1}}$. The influence of the decay $\phi \to \pi^+ \pi^- \gamma$ on the measurement of total cross section $\sigma(e^+e^- \to {\rm hadrons})$ by tagging a photon in the reaction $e^+e^- \to \pi^+\pi^- \gamma$ is also discussed.

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