Search for direct production of a2(1320) and f2(1270) mesons in e+e- annihilation
M.N. Achasov, S.E. Baru, K.I. Beloborodov, A.V. Berdyugin, A.G., Bogdanchikov, A.V. Bozhenok, D.A. Bukin, S.V. Burdin, T.V. Dimova, A.A., Drozdetsky, V.P. Druzhinin, M.S. Dubrovin, I.A. Gaponenko, V.B. Golubev, V.N., Ivanchenko, A.A. Korol, M.S. Korostelev, S.V. Koshuba
TL;DR
This paper reports a search for direct production of specific mesons in electron-positron collisions, setting upper limits on their electronic widths, which constrains their production mechanisms.
Contribution
The study provides the first experimental upper limits on the electronic widths of a2(1320) and f2(1270) mesons in e+e- annihilation.
Findings
Upper limit for Gamma(a2(1320) e+e-) < 0.56 eV
Upper limit for Gamma(f2(1270) e+e-) < 0.11 eV
Constraints on meson production in e+e- collisions
Abstract
A search for direct production of C-even resonances a2(1320) and f2(1270) in e+e- annihilation was performed with SND detector at VEPP-2M e+e- collider. The upper limits of electronic widths of these mesons were obtained at 90% confidence level: Gamma(a2(1320) \to e+e-) < 0.56 eV, Gamma(f2(1270) \to e+e-) < 0.11 eV.
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