Measurement of interference between electromagnetic and strong amplitudes in ψ(2S) decays to two pseudoscalar mesons

S. Dobbs,Z. Metreveli,K. K. Seth, A. Tomaradze,P. Zweber,J. Ernst, H. Severini,S. A. Dytman,S. Mehrabyan, V. Savinov,O. Aquines,Z. Li,A. Lopez,H. Mendez,J. Ramirez, G. S. Huang,D. H. Miller, V. Pavlunin,B. Sanghi, I. P. J. Shipsey,B. Xin,G. S. Adams,M. Anderson,J. P. Cummings,I. Danko,J. Napolitano,J. Insler,H. Muramatsu,E. H. Thorndike,T. E. Coan,Y. S. Gao,F. Liu, R. Stroynowski,M. Artuso,S. Blusk,J. Butt,J. Li,N. Menaa,S. Nisar, K. Randrianarivony, R. Redjimi,R. Sia,T. Skwarnicki,J. C. Wang, K. Zhang,G. Bonvicini,D. Cinabro,M. Dubrovin,A. Lincoln,D. M. Asner, K. W. Edwards,R. A. Briere, I. Brock,J. Chen,T. Ferguson,G. Tatishvili,H. Vogel,M. E. Watkins,J. L. Rosner,N. E. Adam,J. P. Alexander,K. Berkelman,D. G. Cassel,J. E. Duboscq,K. M. Ecklund,R. Ehrlich,R. S. Galik, L. Gibbons,R. Gray,S. W. Gray,D. L. Hartill, B. K. Heltsley,D. Hertz, C. D. Jones,J. Kandaswamy,D. L. Kreinick,V. E. Kuznetsov, H. Mahlke-Kruger, T. O. Meyer, J. R. Patterson,D. Peterson,E. A. Phillips,J. Pivarski,D. Riley, A. Ryd,A. J. Sadofi,S. Stroiney, W. M. Sun,T. Wilksen,M. Weinberger,S. B. Athar,L. Breva-Newell,R. Patel,H. Stoeck,J. Yelton,B. I. Eisenstein, I. Karliner,D. Kim,N. Lowrey,P. Naik,C. Sedlack,M. Selen,E. J. White,J. Wiss,M. R. Shepherd, D. Besson,T. K. Pedlar, D. Cronin-Hennessy,K. Y. Gao,D. T. Gong,J. Hietala,Y. Kubota,T. Klein,B. W. Lang,R. Poling,A. W. Scott,A. Smith, J. Wiss,M. Shepherd,D. Besson,T. Pedlar, D. Cronin-Hennessy,K. Gao,D. Gong,J. Hietala,Y. Kubota,T. Klein,B. Lang,R. Poling,A. Scott,A. Smith

PHYSICAL REVIEW D（2006）

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摘要

Using a sample of 3.08x10(6) psi(2S) decays collected at root s=3.686 GeV with the CLEO detector at the Cornell Electron Storage Ring, we have measured the branching fractions for psi(2S) decays to pseudoscalar pairs pi(+)pi(-), K+K- and (KSKL0)-K-0. We obtain B(psi(2S)->pi(+)pi(-))< 2.1x10(-5) (90% C.L.), B(psi(2S)-> K+K-)=(6.3 +/- 0.6(stat)+/- 0.3(syst))x10(-5), and B(psi(2S)->(KSKL0)-K-0)=(5.8 +/- 0.8(stat)+/- 0.4(syst))x10(-5). The branching fractions allow extraction of the relative phase Delta=(95 +/- 15)degrees and strength ratio R=(2.5 +/- 0.4) of the three-gluon and one-photon amplitudes for these modes.

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