Journal of High Energy Physics (Jan 2021)
Measurement of the e + e − → π + π − process cross section with the SND detector at the VEPP-2000 collider in the energy region 0.525 < s $$ \sqrt{s} $$ < 0.883 GeV
- SND collaboration,
- M. N. Achasov,
- A. A. Baykov,
- A. Yu. Barnyakov,
- K. I. Beloborodov,
- A. V. Berdyugin,
- D. E. Berkaev,
- A. G. Bogdanchikov,
- A. A. Botov,
- T. V. Dimova,
- V. P. Druzhinin,
- V. B. Golubev,
- L. V. Kardapoltsev,
- A. G. Kharlamov,
- I. A. Koop,
- A. A. Korol,
- D. P. Kovrizhin,
- A. S. Kupich,
- A. P. Lysenko,
- K. A. Martin,
- N. A. Melnikova,
- N. Yu. Muchnoi,
- A. E. Obrazovsky,
- E. V. Pakhtusova,
- E. A. Perevedentsev,
- K. V. Pugachev,
- Y. S. Savchenko,
- S. I. Serednyakov,
- Z. K. Silagadze,
- P. Yu. Shatunov,
- Yu. M. Shatunov,
- D. A. Shtol,
- D. B. Shwartz,
- I. K. Surin,
- Yu. V. Usov,
- I. M. Zemlyansky,
- V. N. Zhabin
Affiliations
- SND collaboration
- M. N. Achasov
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- A. A. Baykov
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- A. Yu. Barnyakov
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- K. I. Beloborodov
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- A. V. Berdyugin
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- D. E. Berkaev
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- A. G. Bogdanchikov
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- A. A. Botov
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- T. V. Dimova
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- V. P. Druzhinin
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- V. B. Golubev
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- L. V. Kardapoltsev
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- A. G. Kharlamov
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- I. A. Koop
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- A. A. Korol
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- D. P. Kovrizhin
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- A. S. Kupich
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- A. P. Lysenko
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- K. A. Martin
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- N. A. Melnikova
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- N. Yu. Muchnoi
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- A. E. Obrazovsky
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- E. V. Pakhtusova
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- E. A. Perevedentsev
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- K. V. Pugachev
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- Y. S. Savchenko
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- S. I. Serednyakov
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- Z. K. Silagadze
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- P. Yu. Shatunov
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- Yu. M. Shatunov
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- D. A. Shtol
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- D. B. Shwartz
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- I. K. Surin
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- Yu. V. Usov
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- I. M. Zemlyansky
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- V. N. Zhabin
- Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences
- DOI
- https://doi.org/10.1007/JHEP01(2021)113
- Journal volume & issue
-
Vol. 2021,
no. 1
pp. 1 – 24
Abstract
Abstract The cross section of the process e + e − → π + π − has been measured in the Spherical Neutral Detector (SND) experiment at the VEPP-2000 e + e − collider VEPP-2000 in the energy region 525 0.600 GeV. The ρ meson parameters are obtained as m ρ = 775.3 ± 0.5 ± 0.6 MeV, Γ ρ = 145.6 ± 0.6 ± 0.8 MeV, B ρ→e+e− × B ρ→π+π− = (4.89 ± 0.02 ± 0.04) × 10 −5, and the parameters of the e + e − → ω → π + π − process, suppressed by G-parity, as B ω→e+e− × B ω→π+π− = (1.32 ± 0.06 ± 0.02) × 10 −6 and and ϕ ρω = 110.7 ± 1.5 ± 1.0 degrees.
Keywords
