Preliminary Result of Studying the Transition Electromagnetic Form Factor in the Conversion Decay ω → π⁰e⁺e⁻ on the CMD-3 Detector

期刊论文
发表日期：

2025年6月27日

查看全文

D. N. Grigoriev,
D. S. Vasilevskaya,
V. L. Ivanov,
V. F. Kazanin,
B. D. Kutsenko,
D. V. Shoukovy

摘要

Abstract

Based on the statistics of 13 pb^–1 collected with the CMD-3 detector at energies close to the \(\omega \) -meson mass, the transition electromagnetic form factor has been preliminary measured in the process \(\omega \to {{\pi }^{0}}{{e}^{ + }}{{e}^{ - }}\) . The use of machine learning methods suppresses the main background process \(\omega \to {{\pi }^{ + }}{{\pi }^{ - }}{{\pi }^{0}}\) throughout the entire range of opening angles. The found slope of the form factor \(\Lambda _{\omega }^{{ - 2}} = 1.0 \pm 0.4\) (GeV/c²)^–2 agrees with the Vector Dominant Model (VDM) prediction.

Preliminary Result of Studying the Transition Electromagnetic Form Factor in the Conversion Decay ω → π0e+e− on the CMD-3 Detector

摘要

Preliminary Result of Studying the Transition Electromagnetic Form Factor in the Conversion Decay ω → π⁰e⁺e⁻ on the CMD-3 Detector