J decays into a vector and a pseudoscalar meson and the quark content of the and

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

Research output: Contribution to journalArticlepeer-review


From a study of 2.7×106 J decays with the Mark III detector at the SLAC storage ring SPEAR, we have obtained new measurements of the two-body decays of the J into a vector and a pseudoscalar meson. We present branching ratios for decays to , KK*(892), , the previously unobserved modes , , , 0, 0, and new upper limits on 0 and 0. In the decay J+-, we observe 0- interference. The collection of measured branching ratios are simultaneously fit to a simple model of J decays which includes strong and electromagnetic amplitudes and allows for violation of SU(3) invariance. Using this model, we calculate the strange- and nonstrange-quark content of the and and conclude that (3518)% of the wave function can be attributed to an additional component, e.g., gluonium or radial excitation. The measurement of the 0 branching ratio, when combined with that of the 0 decay mode of the, yields a determination of the 0 electromagnetic-form-factor ratio f(q2=m 2)/f(q2=0) =0.0380.006.

Original languageEnglish (US)
Pages (from-to)2883-2892
Number of pages10
JournalPhysical Review D
Issue number11
StatePublished - 1985
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'J decays into a vector and a pseudoscalar meson and the quark content of the and'. Together they form a unique fingerprint.

Cite this