European Physical Journal C: Particles and Fields (Oct 2020)
Study of dynamics of the process $$e^+e^-\rightarrow \pi ^+\pi ^-\pi ^0$$ e + e - → π + π - π 0 in the energy range 1.15–2.00 GeV
- M. N. Achasov,
- A. Yu. Barnyakov,
- A. A. Baykov,
- K. I. Beloborodov,
- A. V. Berdyugin,
- D. E. Berkaev,
- A. G. Bogdanchikov,
- A. A. Botov,
- T. V. Dimova,
- V. P. Druzhinin,
- V. B. Golubev,
- A. N. Kirpotin,
- L. V. Kardapoltsev,
- A. S. Kasaev,
- A. G. Kharlamov,
- I. A. Koop,
- A. A. Korol,
- D. P. Kovrizhin,
- A. S. Kupich,
- K. A. Martin,
- N. A. Melnikova,
- N. Yu. Muchnoy,
- A. E. Obrazovsky,
- E. V. Pakhtusova,
- K. V. Pugachev,
- D. V. Rabusov,
- Yu. A. Rogovsky,
- Y. S. Savchenko,
- A. I. Senchenko,
- S. I. Serednyakov,
- D. N. Shatilov,
- Yu. M. Shatunov,
- D. A. Shtol,
- D. B. Shwartz,
- Z. K. Silagadze,
- I. K. Surin,
- M. V. Timoshenko,
- Yu. V. Usov,
- V. N. Zhabin,
- V. V. Zhulanov
Affiliations
- M. N. Achasov
- Budker Institute of Nuclear Physics, SB RAS
- A. Yu. Barnyakov
- Budker Institute of Nuclear Physics, SB RAS
- A. A. Baykov
- Budker Institute of Nuclear Physics, SB RAS
- K. I. Beloborodov
- Budker Institute of Nuclear Physics, SB RAS
- A. V. Berdyugin
- Budker Institute of Nuclear Physics, SB RAS
- D. E. Berkaev
- Budker Institute of Nuclear Physics, SB RAS
- A. G. Bogdanchikov
- Budker Institute of Nuclear Physics, SB RAS
- A. A. Botov
- Budker Institute of Nuclear Physics, SB RAS
- T. V. Dimova
- Budker Institute of Nuclear Physics, SB RAS
- V. P. Druzhinin
- Budker Institute of Nuclear Physics, SB RAS
- V. B. Golubev
- Budker Institute of Nuclear Physics, SB RAS
- A. N. Kirpotin
- Budker Institute of Nuclear Physics, SB RAS
- L. V. Kardapoltsev
- Budker Institute of Nuclear Physics, SB RAS
- A. S. Kasaev
- Budker Institute of Nuclear Physics, SB RAS
- A. G. Kharlamov
- Budker Institute of Nuclear Physics, SB RAS
- I. A. Koop
- Budker Institute of Nuclear Physics, SB RAS
- A. A. Korol
- Budker Institute of Nuclear Physics, SB RAS
- D. P. Kovrizhin
- Budker Institute of Nuclear Physics, SB RAS
- A. S. Kupich
- Budker Institute of Nuclear Physics, SB RAS
- K. A. Martin
- Budker Institute of Nuclear Physics, SB RAS
- N. A. Melnikova
- Budker Institute of Nuclear Physics, SB RAS
- N. Yu. Muchnoy
- Budker Institute of Nuclear Physics, SB RAS
- A. E. Obrazovsky
- Budker Institute of Nuclear Physics, SB RAS
- E. V. Pakhtusova
- Budker Institute of Nuclear Physics, SB RAS
- K. V. Pugachev
- Budker Institute of Nuclear Physics, SB RAS
- D. V. Rabusov
- Budker Institute of Nuclear Physics, SB RAS
- Yu. A. Rogovsky
- Budker Institute of Nuclear Physics, SB RAS
- Y. S. Savchenko
- Budker Institute of Nuclear Physics, SB RAS
- A. I. Senchenko
- Budker Institute of Nuclear Physics, SB RAS
- S. I. Serednyakov
- Budker Institute of Nuclear Physics, SB RAS
- D. N. Shatilov
- Budker Institute of Nuclear Physics, SB RAS
- Yu. M. Shatunov
- Budker Institute of Nuclear Physics, SB RAS
- D. A. Shtol
- Budker Institute of Nuclear Physics, SB RAS
- D. B. Shwartz
- Budker Institute of Nuclear Physics, SB RAS
- Z. K. Silagadze
- Budker Institute of Nuclear Physics, SB RAS
- I. K. Surin
- Budker Institute of Nuclear Physics, SB RAS
- M. V. Timoshenko
- Budker Institute of Nuclear Physics, SB RAS
- Yu. V. Usov
- Budker Institute of Nuclear Physics, SB RAS
- V. N. Zhabin
- Budker Institute of Nuclear Physics, SB RAS
- V. V. Zhulanov
- Budker Institute of Nuclear Physics, SB RAS
- DOI
- https://doi.org/10.1140/epjc/s10052-020-08524-4
- Journal volume & issue
-
Vol. 80,
no. 10
pp. 1 – 9
Abstract
Abstract The dynamics of the process $$ e^+e^- \rightarrow \pi ^+\pi ^-\pi ^0 $$ e + e - → π + π - π 0 is studied in the energy region from 1.15 to 2.00 GeV using data accumulated with the SND detector at the VEPP-2000 $$e^+e^-$$ e + e - collider. The Dalitz plot distribution and $$\pi ^+\pi ^-$$ π + π - mass spectrum are analyzed in a model including the intermediate states $$\rho (770)\pi $$ ρ ( 770 ) π , $$\rho (1450)\pi $$ ρ ( 1450 ) π , and $$\omega \pi ^0$$ ω π 0 . As a result, the energy dependences of the $$\rho (770)\pi $$ ρ ( 770 ) π and $$\rho (1450)\pi $$ ρ ( 1450 ) π cross sections and the relative phases between the $$\rho (770)\pi $$ ρ ( 770 ) π amplitude and the $$\rho (1450)\pi $$ ρ ( 1450 ) π and $$\omega \pi ^0$$ ω π 0 amplitudes are obtained. The $$\rho (1450)\pi $$ ρ ( 1450 ) π cross section has a peak in the energy region of the $$\omega (1650)$$ ω ( 1650 ) resonance (1.55–1.75 GeV). In this energy range the contributions of the $$\rho (770)\pi $$ ρ ( 770 ) π and $$\rho (1450)\pi $$ ρ ( 1450 ) π states are of the same order of magnitude. No resonance structure near 1.65 GeV is observed in the $$\rho (770)\pi $$ ρ ( 770 ) π cross section. We conclude that the intermediate state $$\rho (1450)\pi $$ ρ ( 1450 ) π gives a significant contribution to the decay of $$\omega (1650)\rightarrow \pi ^+\pi ^-\pi ^0$$ ω ( 1650 ) → π + π - π 0 , whereas the $$\rho (770)\pi $$ ρ ( 770 ) π mechanism dominates in the decay $$\omega (1420)\rightarrow \pi ^+\pi ^-\pi ^0$$ ω ( 1420 ) → π + π - π 0 .
