Observation of J/ radiative decay to pseudoscalar

R. M. Baltrusaitis, J. J. Becker, G. T. Blaylock, J. S. Brown, K. O. Bunnell, T. H. Burnett, R. E. Cassell, D. Coffman, V. Cook, D. H. Coward, H. Cui, C. Del Papa, D. E. Dorfan, A. L. Duncan, K. F. Einsweiler, B. I. Eisenstein, R. Fabrizio, G. Gladding, F. Grancagnolo, R. P. HamiltonJ. Hauser, C. A. Heusch, D. G. Hitlin, L. Köpke, P. M. Mockett, L. Moss, R. F. Mozley, A. Nappi, A. Odian, R. Partridge, J. Perrier, S. A. Plaetzer, J. D. Richman, J. R. Roehrig, J. J. Russell, H. F.W. Sadrozinski, M. Scarlatella, T. L. Schalk, R. H. Schindler, A. Seiden, J. C. Sleeman, A. L. Spadafora, J. J. Thaler, W. Toki, Y. Unno, F. Villa, A. Wattenberg, N. Wermes, H. J. Willutzki, D. Wisinski, W. J. Wisniewski

Research output: Contribution to journalArticlepeer-review


We present evidence for the radiative decay J/ with a branching fraction of (1.760.090.45)×10-3. The invariant-mass distribution peaks at 1.8 GeV/c2, just above threshold. Analysis of angular correlations indicates that system below 2 GeV/c2 is predominantly pseudoscalar. Upper limits are presented for the branching fractions of decays of the (1690), the gT states near 2.2 GeV/c2, and the c.

Original languageEnglish (US)
Pages (from-to)1723-1726
Number of pages4
JournalPhysical review letters
Issue number17
StatePublished - 1985

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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