Published April 2001 | Version v1
Journal article

Experiments at the VEPP-2M e+e- collider in Novosibirsk

Description

The present status of experiments at VEPP-2M e+e- collider, operating in Novosibirsk in the energy range 2E0 from 0.4 to 1.4 GeV with two detectors SND and CMD-2, is given. The total integrated luminosity, collected by the both detectors is close to 70 pb-1. New radiative decays of light vector mesons ρ, ω, phi into ππγ and ηπ0γ were measured, indicating on a possible exotic structure of light scalar mesons a0(980), f0(980). The decay phi → η'γ was measured with branching ratio, consistent with no large gluonium content in η'. The accuracy of many rare decays of light vector mesons was improved significantly. A broad peak was observed at the cross section of the e+e- → π+π-π0 reaction with the visible mass Mvis = 1220 ± 20 MeV and cross section in the maximum σ0 approx. = 5 nb. The peak can be interpreted as a ω-like resonance ω(1200)

Additional details

Identifiers

PII
S0920563201011318;

Publishing Information

Journal Title
Nuclear Physics. B, Proceedings Supplements
Journal Volume
96
Journal Issue
1-3
Journal Page Range
p. 197-204
ISSN
0920-5632
CODEN
NPBSE7

Conference

Title
International Euroconference on quantum chromodynamics: 15 years of QCD
Acronym
QCD 00
Dates
6-13 Jul 2000
Place
Montepellier (France)

Optional Information

Copyright
Copyright (c) 2001 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.