Study of e+e-→K+K- η process with the CMD-3 detector at VEPP-2000 collider

IVANOV V. L.; AMIRKHANOV A. N.; ANISENKOV A. V.; et al

doi:10.3969/j.issn.0253-2778.2016.06.009

PDF( 1125 KB)

Open Access JUSTC Research Articles:Physics

Study of e⁺e^-→K⁺K^- η process with the CMD-3 detector at 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, University of Sydney, Australia

Funds: Supported in Part by the Russian Science Foundation(14-50-00080), Russian Foundation for Basic Research(RFBR 13-02-00215-a, RFBR 13-02-01134-a, RFBR 14-02-00580-a, RFBR 14-02-31275-mol-a, RFBR 14-02-00047-a, RFBR 14-02-31478-mol-a, RFBR 14-02-91332, RFBR 15-02-0567).

Cite this:

https://doi.org/10.3969/j.issn.0253-2778.2016.06.009

Publish Date: 30 June 2016

Abstract Full text PDF

Abstract

Abstract

The results of the study of e⁺e^--→Ф(1020)η process with the CMD-3 detector are reported. The analysis is based on an integrated luminosity of 22 pb^-1 collected by the CMD-3 in 2011-2012. It was established that only Ф(1020)η intermediate state can be recognized at the current level of CMD-3 statistics. The cross section of e⁺e^--→Ф(1020)η process was measured at 30 center-of-mass energy points in the range from 1.59 up to 2.0 GeV. The η meson was treated as a recoil particle and all the modes of η decay were used. A total of 1454±48 events of signal process were selected. The measured cross section was approximated according to vector meson dominance model as a sum of Ф(1680) and nonresonant amplitudes, and the preliminary results for Ф(1680) meson parameters have been obtained.

Abstract

The results of the study of e⁺e^--→Ф(1020)η process with the CMD-3 detector are reported. The analysis is based on an integrated luminosity of 22 pb^-1 collected by the CMD-3 in 2011-2012. It was established that only Ф(1020)η intermediate state can be recognized at the current level of CMD-3 statistics. The cross section of e⁺e^--→Ф(1020)η process was measured at 30 center-of-mass energy points in the range from 1.59 up to 2.0 GeV. The η meson was treated as a recoil particle and all the modes of η decay were used. A total of 1454±48 events of signal process were selected. The measured cross section was approximated according to vector meson dominance model as a sum of Ф(1680) and nonresonant amplitudes, and the preliminary results for Ф(1680) meson parameters have been obtained.