Measurement of φ(1020) meson leptonic width with CMD-2 detector at VEPP-2M Collider

Europe/Rome
Aula Seminari (Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati)

Aula Seminari

Laboratori Nazionali di Frascati, Via Enrico Fermi 40, Frascati

Via Enrico Fermi 40 00044 Frascati
Description
ABSTRACT

The φ(1020) meson leptonic width has been determined from the combined analysis of 4 ma jor decay modes of the resonance (φ → K +K −, K 0 LK 0 S , π+π−π0 , ηγ ) studied with the CMD-2 detector at the VEPP-2M e+e− collider. The following value has been obtained: Γ(φ → e + e−) = 1.235 ±0.006±0.022 keV. The φ(1020) meson parameters in four main decay channels have been also recalculated: B(φ → K + K −) = 0.493 ± 0.003 ± 0.007, B(φ → KLKS ) = 0.336 ± 0.002 ± 0.006, B(φ → π + π−π0 ) = 0.155 0.002 ± 0.005, B(φ → ηγ ) = 0.0138 ± 0.0002 ± 0.0002.

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