The etapi(+)pi(-) final state in two-photon collisions is studied with the L3 detector at LEP, at centre-of-mass energies from 183 to 209 GeV with an integrated luminosity of 664.6 pb(-1). The f(1) (1285) meson is observed and the Q(2) dependence of its production is compared to different form factor models. The gammagamma-coupling parameter Gamma(gammagamma) is found to be 3.5 +/- 0.6(stat.) +/- 0.5 (sys.) keV. The branching fraction Gamma(f(1)(1285) --> a(0)pi) / Gamma(f(1)(1285) --> etapipi) is also measured. (C) 2002 Elsevier Science B.V. All rights reserved.

f(1) (1285) formation in two-photon collisions at LEP / Achard, P., Adriani, O., AGUILAR BENITEZ, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M.g., Anderhub, H., Andreev, V.p., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, G., Baksay, L., Baldew, S.v., Banerjee, S., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 526:(2002), pp. 269-277. [10.1016/S0370-2693(01)01477-0]

f(1) (1285) formation in two-photon collisions at LEP

BAGNAIA, Paolo;GENTILE, Simonetta;GIAGU, Stefano;LUCI, Claudio;ORGANTINI, Giovanni;PARAMATTI, Riccardo;
2002

Abstract

The etapi(+)pi(-) final state in two-photon collisions is studied with the L3 detector at LEP, at centre-of-mass energies from 183 to 209 GeV with an integrated luminosity of 664.6 pb(-1). The f(1) (1285) meson is observed and the Q(2) dependence of its production is compared to different form factor models. The gammagamma-coupling parameter Gamma(gammagamma) is found to be 3.5 +/- 0.6(stat.) +/- 0.5 (sys.) keV. The branching fraction Gamma(f(1)(1285) --> a(0)pi) / Gamma(f(1)(1285) --> etapipi) is also measured. (C) 2002 Elsevier Science B.V. All rights reserved.
2002
01 Pubblicazione su rivista::01a Articolo in rivista
f(1) (1285) formation in two-photon collisions at LEP / Achard, P., Adriani, O., AGUILAR BENITEZ, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M.g., Anderhub, H., Andreev, V.p., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, G., Baksay, L., Baldew, S.v., Banerjee, S., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 526:(2002), pp. 269-277. [10.1016/S0370-2693(01)01477-0]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/248070
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