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IHEP 2001 - 34 | |
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| V.V.Molchanov (Full list of authors is given at page 11) | ||
| Radiative Decay width of the a2(1320)- Meson | ||
| Protvino, 2001.- p.11, figs. 5, tables 2, refs.:29. | ||
Coherent $\pi^+\pi^-\pi^-$ production in the interactions of a beam of $600\,\MathRm{GeV}$ $\pi^-$ mesons with C, Cu and Pb nuclei has been studied with the SELEX facility (Experiment E781 at Fermilab). The $a_2(1320)$ meson signal has been detected in the Coulomb (low~$q^2$) region. The Primakoff formalism used to extract radiative decay width of this meson yields $\Gamma=284\pm25\pm25\,\MathRm{keV}$, which is the most precise measurement to date.
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