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Study of Dynamics of the Process in the Energy Range between 1.075 and 1.975 GeV

Physics of Atomic Nuclei, ISSN: 1562-692X, Vol: 87, Issue: 6, Page: 747-762
2024
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Article Description

Abstract: The process 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 that were accumulated in an experiment with the Spherical Neutral Detector (SND) at the VEPP-2000 collider. The respective Dalitz distributions were analyzed within a model that includes,, and intermediate states. As a result, the energy dependences of the total cross section for the process and the cross sections for the and intermediate states were measured along with the phase shift of the amplitude with respect to the and amplitudes. For the first time, a simultaneous approximation of the cross sections for the processes and and the relative phase of the respective final states was performed on the basis of the vector-meson dominance model. The contributions of the,,, and resonances were taken into account. The approximation showed that the decay proceeds predominantly through the intermediate state, while the decay receives a dominant contribution from the mechanism. The results of this study refined the results of earlier measurements with the SND setup.

Bibliographic Details

M. N. Achasov; A. Yu. Barnyakov; K. I. Beloborodov; D. E. Berkaev; A. V. Berdyugin; A. G. Bogdanchikov; A. A. Botov; V. S. Denisov; T. V. Dimova; V. P. Druzhinin; V. N. Zhabin; V. V. Zhulanov; I. M. Zemlyansky; L. V. Kardapoltsev; A. A. Kattsin; A. N. Kirpotin; D. P. Kovrizhin; I. A. Koop; A. A. Korol; A. S. Kupich; A. P. Krukov; N. A. Melnikova; N. Yu. Muchnoi; A. E. Obrazovsky; E. V. Pakhtusova; E. A. Perevedentsev; K. V. Pugachev; Yu. A. Rogovsky; S. I. Serednyakov; Z. K. Silagadze; I. K. Surin; M. V. Timoshenko; Yu. V. Usov; L. B. Fomin; A. G. Kharlamov; Yu. M. Shatunov; D. A. Shtol; E. A. Eminov

Pleiades Publishing Ltd

Physics and Astronomy

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