Decay phi->pi+pi

Phys.Lett.B474:188-193,2000 The process e+e- ->pi+pi- has been studied with the SND detector at VEPP-2M e+e- collider in the vicinity of phi(1020) resonance. From the analysis of the energy dependence of measured cross section the branching ratio B(phi->pi+pi-)=(7.1+-1.1+-0.9)*10^{-5} and the...

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Main Authors Achasov, M. N, Beloborodov, K. I, Berdyugin, A. V, Bozhenok, A. V, Bukin, A. D, Bukin, D. A, Burdin, S. V, Dimova, T. V, Druzhinin, V. P, Dubrovin, M. S, Ganyushin, D. I, Gaponenko, I. A, Golubev, V. B, Ivanchenko, V. N, Ivanov, P. M, Korol, A. A, Koshuba, S. V, Pakhtusova, E. V, Perevedentsev, E. A, Salnikov, A. A, Serednyakov, S. I, Shary, V. V, Shatunov, Yu. M, Sidorov, V. A, Silagadze, Z. K, Valishev, A. A, Vasiljev, A. V
Format Journal Article
LanguageEnglish
Published 21.01.2000
Subjects
Physics - High Energy Physics - Experiment
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Summary:Phys.Lett.B474:188-193,2000 The process e+e- ->pi+pi- has been studied with the SND detector at VEPP-2M e+e- collider in the vicinity of phi(1020) resonance. From the analysis of the energy dependence of measured cross section the branching ratio B(phi->pi+pi-)=(7.1+-1.1+-0.9)*10^{-5} and the phase psi_pi=-(34+-4+-3)degrees of interference with the non-resonant pi+pi- production amplitude were obtained.
DOI:10.48550/arxiv.hep-ex/0001048