A.A. Grebenuk

Update: A reanalysis of hadronic cross section measurements at CMD-2

The updated results of the precise measurements of the processes e+e-->rho->pi+pi-, e+e-->omega->pi+pi-pi0 and e+e-->phi->KLKS performed by the CMD-2 collaboration are presented. The update appeared necessary due an overestimate of the integrated luminosity in previous analyses.

Measurement of e+e- → π+π- cross-section with CMD-2 around ρ-meson

The cross section of the process e+e- ->pi+pi- has been measured using about 114000 events collected by the CMD-2 detector at the VEPP-2M e+e- collider in the center-of-mass energy range from 0.61 to 0.96 GeV. Results of the pion form factor determination with a 0.6% systematic uncertainty are presented. Implications for the hadronic contribution to the muon anomalous magnetic moment are discussed.

High-statistics measurement of the pion form factor in the ρ-meson energy range with the CMD-2 detector

We present a measurement of the pion form factor based on e+e- annihilation data from the CMD-2 detector in the energy range 0.6<sqrt(s)<1.0 GeV with a systematic uncertainty of 0.8%. A data sample is five times larger than that used in our previous measurement.

Measurement of the refractive index of liquid xenon for intrinsic scintillation light

Abstract Measurement of the refractive index of liquid xenon (LXe) for intrinsic scintillation light was carried out. The value obtained at λ = 180 nm is equal to 1.5655 ± 0.0024 ± 0.0078 for the xenon triple point.

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

The φ(1020) meson leptonic width has been determined from the combined analysis of 4 major decay modes of the resonance (φ → KK,K LK0 S , πππ, ηγ) studied with the CMD-2 detector at the VEPP-2M ee collider. The following value has been obtained: Γ(φ → ee) = 1.235 ± 0.006 ± 0.022 keV. The φ(1020) meson parameters in four main decay channels have been also recalculated: B(φ → KK) = 0.493 ± 0.003 ± 0.007, B(φ → KLKS) = 0.336 ± 0.002 ± 0.006, B(φ → πππ) = 0.155 ± 0.002 ± 0.005, B(φ → ηγ) = 0.0138 ± 0.0002 ± 0.0002. 1 Currently in Heidelberg University, 69047 Heidelberg, Germany 2 Corresponding author:P.A.Lukin@inp.nsk.su 3 Deceased Preprint submitted to Elsevier Preprint 17 November 2010

Study of the process

A cross section of the process

e^+e^-\to \pi^+\pi^-\pi^+\pi^-

e^+e^- \to \pipi\pipi

in the c.m. energy range 920–1060 MeV with the CMD-3 detector

has been measured using 6798

The readout and timing electronics of the liquid xenon calorimeter for the CMD-2M detector☆

\pm

MEASUREMENT OF THE

93 signal events from a data sample corresponding to an integrated luminosity of 9.8 pb