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

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

2008-03-05

arxiv.org/abs/0803.0706v2

Phys.Rev.C77:065214,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 6 figures Added formulas for axial meson decay in 3 pions Modified version to appear in PRC

Scientific paper

10.1103/PhysRevC.77.065214

A model independent formalism for the electron positron annihilation reaction $e^++e^-\to a_1(1260)+\pi $ 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 $\gamma^*a_1\pi $ 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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