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27 April 2024

» arxiv » 2007.14595

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Study of dynamics of the process $e^+e^- o π^+π^-π^0$ in the energy range 1.15--2.00 GeV
SND Collaboration ; 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. Muchnoi ; 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 ;
Date:	29 Jul 2020
Abstract:	The dynamics of the process $ e^+e^- o pi^+pi^-pi^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 $e^+e^-$ collider. The Dalitz plot distribution and $pi^+pi^-$ mass spectrum are analyzed in a model including the intermediate states $ ho(770)pi$, $ ho(1450)pi$, and $omegapi^0$. As a result, the energy dependences of the $ ho(770)pi$ and $ ho(1450)pi$ cross sections and the relative phases between the $ ho(770)pi$ amplitude and the $ ho(1450)pi $ and $omegapi^0$ amplitudes are obtained. The $ ho(1450)pi$ cross section has a peak in the energy region of the $omega(1650)$ resonance (1.55-1.75 GeV). In this energy range the contributions of the $ ho(770)pi$ and $ ho(1450)pi$ states are of the same order of magnitude. No resonance structure near 1.65 GeV is observed in the $ ho(770)pi$ cross section. We conclude that the intermediate state $ ho(1450)pi$ gives a significant contribution to the decay of $omega (1650) opi^+pi^-pi^0$, whereas the $ ho(770)pi$ mechanism dominates in the decay $omega(1420) opi^+pi^-pi^0$.
Source:	arXiv, 2007.14595
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