Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-06-30
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, 4 figures, talk at EURIDICE Midterm Collaboration Meeting, Frascati, 8-12 February
Scientific paper
In this paper we consider the possibility to test the FSR model in the reaction $e^+e^-\to\pi^+\pi^-\gamma$ at DA$\Phi$NE. We propose to consider the low $Q^2$ region ($Q^2$ is the invariant mass squared of the di-pion system) to study the different models describing $gamma^*\to\pi^+\pi^-\gamma$ interaction. As illustration we compare the scalar QED and Resonance Perturbation Theory prediction for the $e^+e^-\to\pi^+\pi^-\gamma$ cross section. We also consider the contribution coming from the $\phi$ direct decay ($\phi\to\pi^+\pi^-\gamma$). We find the low $Q^2$ region is sensitive to FSR models.
Pancheri Giulia
Shekhovtsova Olga
Venanzoni Graziano
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