TY - JOUR

T1 - Study of Dynamics of the Process e+e−→π+π−π0 in the Energy Range between 1.075 and 1.975 GeV

AU - Achasov, M. n.

AU - Barnyakov, A. yu.

AU - Beloborodov, K. i.

AU - Berkaev, D. e.

AU - Berdyugin, A. v.

AU - Bogdanchikov, A. g.

AU - Botov, A. a.

AU - Denisov, V. s.

AU - Dimova, T. v.

AU - Druzhinin, V. p.

AU - Zhabin, V. n.

AU - Zhulanov, V. v.

AU - Zemlyansky, I. m.

AU - Kardapoltsev, L. v.

AU - Kattsin, A. a.

AU - Kirpotin, A. n.

AU - Kovrizhin, D. p.

AU - Koop, I. a.

AU - Korol, A. a.

AU - Kupich, A. s.

AU - Krukov, A. p.

AU - Melnikova, N. a.

AU - Muchnoi, N. yu.

AU - Obrazovsky, A. e.

AU - Pakhtusova, E. v.

AU - Perevedentsev, E. a.

AU - Pugachev, K. v.

AU - Rogovsky, Yu. a.

AU - Serednyakov, S. i.

AU - Silagadze, Z. k.

AU - Surin, I. k.

AU - Timoshenko, M. v.

AU - Usov, Yu. v.

AU - Fomin, L. b.

AU - Kharlamov, A. g.

AU - Shatunov, Yu. m.

AU - Shtol, D. a.

AU - Eminov, E. a.

N1 - This work was supported by Russian Science Foundation under grant no. 24-22-00203.

PY - 2024/12/6

Y1 - 2024/12/6

N2 - The process e+e−→π+π−π0 was studied in the energy range between 1.075 and 1.975 GeV on the basis of data characterized by an integrated luminosity of about 70 pb−1 that were accumulated in an experiment with the Spherical Neutral Detector (SND) at the VEPP-2000 e+e− collider. The respective Dalitz distributions were analyzed within a model that includes ρ(770)π, ρ(1450)π, and ωπ0 intermediate states. As a result, the energy dependences of the total cross section for the process e+e−→π+π−π0 and the cross sections for the ρ(770)π and ρ(1450)π intermediate states were measured along with the phase shift of the ρ(770)π amplitude with respect to the ρ(1450)π and ωπ0 amplitudes. For the first time, a simultaneous approximation of the cross sections for the processes e+e−→ρ(770)π and ρ(1450)π and the relative phase of the respective final states was performed on the basis of the vector-meson dominance model. The contributions of the ω, ϕ, ω(1420), and ω(1650) resonances were taken into account. The approximation showed that the decay ω(1650)→π+π−π0 proceeds predominantly through the ρ(1450)π intermediate state, while the decay ω(1420)→π+π−π0 receives a dominant contribution from the ρ(770)π mechanism. The results of this study refined the results of earlier measurements with the SND setup.

AB - The process e+e−→π+π−π0 was studied in the energy range between 1.075 and 1.975 GeV on the basis of data characterized by an integrated luminosity of about 70 pb−1 that were accumulated in an experiment with the Spherical Neutral Detector (SND) at the VEPP-2000 e+e− collider. The respective Dalitz distributions were analyzed within a model that includes ρ(770)π, ρ(1450)π, and ωπ0 intermediate states. As a result, the energy dependences of the total cross section for the process e+e−→π+π−π0 and the cross sections for the ρ(770)π and ρ(1450)π intermediate states were measured along with the phase shift of the ρ(770)π amplitude with respect to the ρ(1450)π and ωπ0 amplitudes. For the first time, a simultaneous approximation of the cross sections for the processes e+e−→ρ(770)π and ρ(1450)π and the relative phase of the respective final states was performed on the basis of the vector-meson dominance model. The contributions of the ω, ϕ, ω(1420), and ω(1650) resonances were taken into account. The approximation showed that the decay ω(1650)→π+π−π0 proceeds predominantly through the ρ(1450)π intermediate state, while the decay ω(1420)→π+π−π0 receives a dominant contribution from the ρ(770)π mechanism. The results of this study refined the results of earlier measurements with the SND setup.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85217409796&origin=inward&txGid=407e3bd880dba47988c96fb661284583

UR - https://www.elibrary.ru/item.asp?id=76807699

U2 - 10.1134/S1063778824700728

DO - 10.1134/S1063778824700728

M3 - Article

VL - 87

SP - 747

EP - 762

JO - Physics of Atomic Nuclei

JF - Physics of Atomic Nuclei

SN - 1063-7788

IS - 6

M1 - 10

ER -