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

Monday 13 Dec 2010, 15:00 → 17:00 Europe/Rome

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

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.

Slides LNFSeminar131210.pdf