Observation of a narrow KK state in J radiative decays

R. M. Baltrusaitis, J. J. Becker, G. T. Blaylock, T. Bolton, J. S. Brown, K. O. Bunnell, T. H. Burnett, R. E. Cassell, D. Coffman, V. Cook, D. H. Coward, H. Cui, S. Dado, C. Del Papa, D. E. Dorfan, G. P. Dubois, A. L. Duncan, G. Eigen, K. F. Einsweiler, B. I. EisensteinR. Fabrizio, D. Favart, G. Gladding, F. Grancagnolo, A. D. Guy, R. P. Hamilton, J. Hauser, C. A. Heusch, D. G. Hitlin, L. Köpke, W. S. Lockman, U. Mallik, C. G. Matthews, P. M. Mockett, L. Moss, R. F. Mozley, A. Nappi, B. Nemati, A. Odian, R. Partridge, J. Perrier, S. A. Plaetzer, J. D. Richman, J. Roehrig, J. J. Russell, H. F.W. Sadrozinski, M. Scarlatella, T. L. Schalk, R. H. Schindler, A. Seiden, C. Simopoulos, J. C. Sleeman, A. L. Spadafora, I. E. Stockdale, J. J. Thaler, B. Tripsas, W. Toki, Y. Unno, F. Villa, S. Wasserbaech, A. Wattenberg, A. J. Weinstein, N. Wermes, H. J. Willutzki, D. Wisinski, W. J. Wisniewski, G. Wolf, R. Xu, Y. Zhu

Research output: Contribution to journalArticlepeer-review


Evidence is presented for a narrow state, called , in the decay modes J, K+K-, and KS0KS0. In the K+K- mode, the has a mass of 2.2300.0060.014 GeV/c2, a width of =0.026-0.016+0.020 0.017 GeV/c2, a product branching ratio of (4.2-1.4+1.70.8)×10 -5, and a statistical significance of 4.5 standard deviations. In the KS0KS0 mode, it has a mass of 2.2320.0070.007 GeV/c2, a width of =0.018-0.015+0.023 0.010 GeV/c2, a product branching ratio of (3.1-1.3+1.60.7)×10 -5, and a statistical significance of 3.6 standard deviations. Limits on decay to other final states are presented.

Original languageEnglish (US)
Pages (from-to)107-110
Number of pages4
JournalPhysical review letters
Issue number2
StatePublished - 1986
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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