ηc(2980) production in γγ interactions has been detected via its decays into Ks0K±π ∓, K+K-K+K- and K +K-π+π- in the data taken with the DELPHI detector at LEP1 and LEP2 energies. The two-photon radiative width averaged over all observed decay channels is Γγγ = 13.9 ± 2.0 (stat.) ± 1.4(syst.) ± 2.7 (BR) keV. No direct decay channel ηc → π+π -π+π- has been observed. An upper limit Γγγ < 5.5 keV at 95% confidence level has been evaluated for this decay mode

Abdallah, J., Abreu, P., Adam, W., Adzic, P., Albrecht, T., Alderweireld, T., et al. (2003). The ηc(2980) formation in two-photon collisions at LEP energies. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 31(4), 481-489 [10.1140/epjc/s2003-01384-0].

The ηc(2980) formation in two-photon collisions at LEP energies

Calvi, M;PAGANONI, MARCO;TABARELLI DE FATIS, TOMMASO;
2003

Abstract

ηc(2980) production in γγ interactions has been detected via its decays into Ks0K±π ∓, K+K-K+K- and K +K-π+π- in the data taken with the DELPHI detector at LEP1 and LEP2 energies. The two-photon radiative width averaged over all observed decay channels is Γγγ = 13.9 ± 2.0 (stat.) ± 1.4(syst.) ± 2.7 (BR) keV. No direct decay channel ηc → π+π -π+π- has been observed. An upper limit Γγγ < 5.5 keV at 95% confidence level has been evaluated for this decay mode
Articolo in rivista - Articolo scientifico
Engineering (miscellaneous); Physics and Astronomy (miscellaneous)
English
2003
31
4
481
489
none
Abdallah, J., Abreu, P., Adam, W., Adzic, P., Albrecht, T., Alderweireld, T., et al. (2003). The ηc(2980) formation in two-photon collisions at LEP energies. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 31(4), 481-489 [10.1140/epjc/s2003-01384-0].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/155925
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