Measurement of [formula omitted] cross section with CMD-2 detector at VEPP-2M collider

R.R Akhmetshin,B.I Khazin,V.S Okhapkin,N.S Bashtovoy,D.V Bondarev,S.E Baru,D.N Grigoriev,N.M Ryskulov,I.B Logashenko,I.G Snopkov,V.Sh Banzarov,G.V Fedotovich,A.V Bragin,F.V Ignatov,V Aulchenko ,P Krokovny ,P Lukin ,S V Karpov ,А.а Гребенюк ,E A Perevedentsev ,B Shwartz ,В Ф Казанин ,А С Попов ,I A Koop ,N Gabyshev ,S Eidelman ,А П Лысенко ,Л.м Барков ,S I Redin ,A Kuzmin ,E P Solodov ,А.а Рубан ,A Sibidanov ,K Mikhailov ,D Epifanov ,A Bondar ,Yu M Shatunov ,Yu V Yudin

doi:10.1016/j.physletb.2008.09.053

Measurement of [formula omitted] cross section with CMD-2 detector at VEPP-2M collider

R.R Akhmetshin, B.I Khazin + Show 36 more

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https://doi.org/10.1016/j.physletb.2008.09.053

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Journal: Physics Letters B	Publication Date: Oct 2, 2008
Citations: 37	License type: cc-by

Affiliation: Budker Institute of Nuclear Physics, Novosibirsk State University

#CMD-2 Detector #VEPP-2M Collider + Show 5 more

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Abstract

The process e+e−→ϕ→K+K− has been studied with the CMD-2 detector using about 542 000 events detected in the center-of-mass energy range from 1.01 to 1.034 GeV. The systematic error of the cross section is estimated to be 2.2%. The ϕ(1020) meson parameters in the ϕ→K+K− decay channel have been measured: σ0(ϕ→K+K−)=2016±8±44 nb, mϕ=1019.441±0.008±0.080 MeV/c2, Γϕ=4.24±0.02±0.03 MeV, Be+e−BK+K−=(14.27±0.05±0.31)×10−5.

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