Evidence for parity nonconservation in the decays of the narrow states near 1.87 GeV/c2

J. E. Wiss, G. Goldhaber, G. S. Abrams, M. S. Alam, A. M. Boyarski, M. Breidenbach, W. C. Carithers, S. Cooper, R. G. Devoe, J. M. Dorfan, G. J. Feldman, C. E. Friedberg, D. Fryberger, G. Hanson, J. Jaros, A. D. Johnson, J. A. Kadyk, R. R. Larsen, D. Lüke, V. LüthH. L. Lynch, R. J. Madaras, C. C. Morehouse, H. K. Nguyen, J. M. Paterson, M. L. Perl, I. Peruzzi, M. Piccolo, F. M. Pierre, T. P. Pun, P. Rapidis, B. Richter, B. Sadoulet, R. H. Schindler, R. F. Schwitters, J. Siegrist, W. Tanenbaum, G. H. Trilling, F. Vanucci, J. S. Whitaker

Research output: Contribution to journalArticlepeer-review


We have studied the Dalitz plot for the recently observed charged state decaying into Kâ>π±π± at 1876 MeV/c2 and we find that the final state is incompatible with a natural spin and parity assignment. This information, coupled with the earlier observation of the K±πâ> decay mode (a final state of natural spin and parity) of the neutral state at 1865 MeV/c2, suggest parity nonconservation in the decays of these objects if they are members of the same isomultiplet as their proximity in mass suggests.

Original languageEnglish (US)
Pages (from-to)1531-1534
Number of pages4
JournalPhysical review letters
Issue number23
StatePublished - 1976
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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