Measurement of e+e-→ηπ+π- and e+e-→ωπ+π- cross sections with the CMD-3 detector at the VEPP-2000 collider

POPOV A. S.; AKHMETSHIN R. R.; AMIRKHANOV A. N.; et al

doi:doi:10.3969/j.issn.0253-2778.2016.06.011

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Open Access JUSTC Research Articles:Physics

Measurement of e+e-→ηπ+π- and e+e-→ωπ+π- cross sections with the CMD-3 detector at the VEPP-2000 collider

1.
Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia
2.
Novosibirsk State University, Novosibirsk 630090, Russia
3.
Novosibirsk State Technical University, Novosibirsk 630092, Russia
4.
Falkiner High Energy Physics Department, School of Physics, University of Sydney, Australia
5.
Department of Physics, University of Tokyo, 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033, Japan

Funds: Supported by Russian Foundation for Basic Research(15-02-05674).

Cite this:

https://doi.org/doi:10.3969/j.issn.0253-2778.2016.06.011

Publish Date: 30 June 2016

Abstract Full text PDF

Abstract

Abstract

The processes +e-→ηπ+π-→γγπ+π-,e+e-→ηπ+π-→π0π+π-π+π- and e+e-→ωπ+π-→π0π+π-π+π- have been studied with the CMD-3 detector at the VEPP2000 collider. For analysis data collected in the center-of-mass energy range from 1.2 to 2.0 GeV is used. Studied data corresponding to an integrated luminosity of 3×10⁴ nb^-1 were recorded in 2011 and 2012. The Born cross section of e+e-→ηπ+π- has been measured in the η→γγ channel and is in good agreement with results obtained in other experiments. There are also preliminary results for the e+e--→ηπ+π- and e+e-→ωπ+π- Born cross sections in the η→π+π-π0 and ω→π+π-π0 final states, respectively. The e+e-→ηπ+π- Born cross section data have been used to determine the τ-→ηπ-π0ντ decay branching fraction.

Abstract

The processes +e-→ηπ+π-→γγπ+π-,e+e-→ηπ+π-→π0π+π-π+π- and e+e-→ωπ+π-→π0π+π-π+π- have been studied with the CMD-3 detector at the VEPP2000 collider. For analysis data collected in the center-of-mass energy range from 1.2 to 2.0 GeV is used. Studied data corresponding to an integrated luminosity of 3×10⁴ nb^-1 were recorded in 2011 and 2012. The Born cross section of e+e-→ηπ+π- has been measured in the η→γγ channel and is in good agreement with results obtained in other experiments. There are also preliminary results for the e+e--→ηπ+π- and e+e-→ωπ+π- Born cross sections in the η→π+π-π0 and ω→π+π-π0 final states, respectively. The e+e-→ηπ+π- Born cross section data have been used to determine the τ-→ηπ-π0ντ decay branching fraction.