학술논문
Measurement of the branching fraction of J/ψ → ρπ at KEDR.
Document Type
Article
Author
Anashin, V. V.; Anchugov, O. V.; Andrianov, A. V.; Astrelina, K. V.; Aulchenko, V. M.; Baldin, E. M.; Baranov, G. N.; Barladyan, A. K.; Barnyakov, A. Yu.; Barnyakov, M. Yu.; Basok, I. Yu.; Batrakov, A. M.; Bekhtenev, E. A.; Belikov, O. V.; Berkaev, D. E.; Blinov, A. E.; Blinov, V. E.; Blinov, M. F.; Bobrov, A. V.; Bobrovnikov, V. S.
Source
Subject
Language
ISSN
1126-6708
Abstract
We present the study of the decay J/ψ → ρπ. The results are based on of 5.2 million J/ψ events collected by the KEDR detector at the VEPP-4M collider. The branching fractions are measured to be B (J/ψ → ρπ) = (2.072 ± 0.017 ± 0.062) ∙ 10−2 and B (J/ψ → π+π−π0) = (1.878 ± 0.013 ± 0.051) ∙ 10−2, where the first uncertainties are statistical and the second systematic. Our results are more precise than the previous relative measurements. [ABSTRACT FROM AUTHOR]