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arXiv · hep-ex/0001048

Decay phi->pi+pi-

M. N. Achasov·K. I. Beloborodov·A. V. Berdyugin·A. V. Bozhenok·A. D. Bukin·D. A. Bukin·S. V. Burdin·T. V. Dimova·V. P. Druzhinin·M. S. Dubrovin·D. I. Ganyushin·I. A. Gaponenko·V. B. Golubev·V. N. Ivanchenko·P. M. Ivanov·A. A. Korol·S. V. Koshuba·E. V. Pakhtusova·E. A. Perevedentsev·A. A. Salnikov·S. I. Serednyakov·V. V. Shary·Yu. M. Shatunov·V. A. Sidorov·Z. K. Silagadze·A. A. Valishev·A. V. Vasiljev
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Abstract

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.

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M. N. Achasov, K. I. Beloborodov, A. V. Berdyugin, A. V. Bozhenok, A. D. Bukin, D. A. Bukin, S. V. Burdin, T. V. Dimova, V. P. Druzhinin, M. S. Dubrovin, D. I. Ganyushin, I. A. Gaponenko, V. B. Golubev, V. N. Ivanchenko, P. M. Ivanov, A. A. Korol, S. V. Koshuba, E. V. Pakhtusova, E. A. Perevedentsev, A. A. Salnikov, S. I. Serednyakov, V. V. Shary, Yu. M. Shatunov, V. A. Sidorov, Z. K. Silagadze, A. A. Valishev, A. V. Vasiljev. 2000-01-21. Decay phi->pi+pi-. https://doi.org/10.1016/s0370-2693(00)01477-x

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