Radiative decay width of the a2(1320)^- meson

Details Radiative decay width of the a2(1320)^- meson Radiative decay width of the a2(1320)^- meson

2001-09-13

arxiv.org/abs/hep-ex/0109016v2

Phys.Lett.B521:171-180,2001

Physics

High Energy Physics

High Energy Physics - Experiment

16 pages, 5 figures, LaTeX, elsart, added reference and minor corrections, submitted to Phys.Lett.B

Scientific paper

10.1016/S0370-2693(01)01194-7

Coherent pi^+pi^-pi^- production in the interactions of a beam of 600 GeV pi^- mesons with C, Cu and Pb nuclei has been studied with the SELEX facility (Experiment E781 at Fermilab). The a2(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+/-25+/-25 keV, which is the most precise measurement to date.

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