Inelastic electron-pion scattering at FNAL (SELEX)

Abstract

In this report we describe the analysis status of electron-pion inelastic scattering $\pi e\to {\pi }^{\prime }{e}^{\prime }\gamma$ and $\pi e\to {\pi }^{\prime }{e}^{\prime }{\pi }^0$ reaction data, measured in inverse pion-electron scattering at 590 GeV/c at FNAL. The data give information on reactions that were never previously measured: (1) $\pi e\to \rho e^{\prime }$ scattering for a determination of the $\rho \to \pi \gamma$ radiative width from a measurement of the transition form factor near zero momentum transfer, (2) $\pi e\to e^{\prime }{\pi }^{\prime }{\pi }^0$ scattering near threshold for a determination of the chiral anomaly transition form factor and the $\gamma \to 3\pi$ F${}_{3\pi }$ chiral anomaly amplitude, and (3) $\pi e\to {\pi }^{\prime }{e}^{\prime }\gamma$ scattering, in which a virtual photon from the electron's Coulomb field is Compton scattered on the pion, for a determination of the never previously measured generalized pion polarizabilities.

8 pages, 1 figure, 1 macro, corrected collab. list