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arXiv · 0803.0706

Cross section and polarization observables for the reaction $e^++e^-\to a_1(1260)+π$

E. Tomasi-Gustafsson·G. I. Gakh·C. Adamuščín
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Abstract

A model independent formalism for the electron positron annihilation reaction $e^++e^-\to a_1(1260)+π$ has been derived. The differential and total cross sections and the elements of the spin--density matrix of the $a_1$-meson were calculated in terms of the electromagnetic form factors of the corresponding $γ^*a_1π$ current. Simple models of $a_1$ form factors have been fitted to the available cross section data and they allow to give numerical predictions for the different observables.

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E. Tomasi-Gustafsson, G. I. Gakh, C. Adamuščín. 2008-06-04. Cross section and polarization observables for the reaction $e^++e^-\to a_1(1260)+π$. https://doi.org/10.1103/physrevc.77.065214

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