Observation Of The H(C)(1p) Using E(+)E(-) Collisions Above The D(D)Over-Bar Threshold

T. K. Pedlar,D. Cronin-Hennessy, J. Hietala,S. Dobbs,Z. Metreveli,K. K. Seth,A. Tomaradze,T. Xiao,L. Martin,A. Powell, G. Wilkinson,H. Mendez, J. Y. Ge,D. H. Miller,I. P. J. Shipsey,B. Xin,G. S. Adams,D. Hu, B. Moziak,J. Napolitano,K. M. Ecklund,J. Insler,H. Muramatsu,C. S. Park,L. J. Pearson,E. H. Thorndike,S. Ricciardi,C. Thomas,M. Artuso,S. Blusk,R. Mountain,T. Skwarnicki,S. Stone,L. M. Zhang, G. Bonvicini,D. Cinabro,A. Lincoln,M. J. Smith,P. Zhou,J. Zhu,P. Naik,J. Rademacker,D. M. Asner,K. W. Edwards, K. Randrianarivony,G. Tatishvili,R. A. Briere,H. Vogel,P. U. E. Onyisi,J. L. Rosner,J. P. Alexander,D. G. Cassel,S. Das,R. Ehrlich, L. Gibbons,S. W. Gray,D. L. Hartill,B. K. Heltsley,D. L. Kreinick,V. E. Kuznetsov,J. R. Patterson, D. Peterson,D. Riley,A. Ryd,A. J. Sadoff,X. Shi,W. M. Sun, J. Yelton,P. Rubin,N. Lowrey,S. Mehrabyan,M. Selen,J. Wiss,J. Libby, M. Kornicer,R. E. Mitchell,M. R. Shepherd, C. M. Tarbert, D. Besson

PHYSICAL REVIEW LETTERS（2011）

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摘要

Using 586 pb(-1) of e(+)e(-) collision data at E-c.m = 4170 MeV, produced at the Cornell Electron Storage Ring collider and collected with the CLEO-c detector, we observe the process e(+)e(-) -> pi(+)pi(-)h(c)(1P). We measure its cross section to be 15.6 +/- 2.3 +/- 1.9 +/- 3.0 pb, where the third error is due to the external uncertainty on the branching fraction of psi(2S) -> pi(0)h(c)(1P), which we use for normalization. We also find evidence for e(+)e(-) -> eta h(c)(1P) at 4170 MeV at the 3 sigma level and see hints of a rise in the e(+)e(-) -> pi(+)pi(-)h(c)(1P) cross section at 4260 MeV.

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