Search for the forbidden decays Ε↠3Î and Ε↠π0Î and the rare decay Ε↠π0Ï€0Î Î

B. M K Nefkens, S. Prakhov, C. E. Allgower, V. Bekrenv, W. J. Briscoe, M. Clajus, J. R. Comfort, K. Craig, D. Grosnick, D. Isenhower, N. Knecht, D. Koetke, A. Koulbardis, N. Kozlenko, S. Kruglov, G. Lolos, I. Lopatin, D. M. Manley, R. Manweiler, A. MarusićS. McDonald, J. Olmsted, Z. Papandreou, D. Peaslee, N. Phaisangittisakul, J. W. Price, A. F. Ramirez, M. Sadler, A. Shafi, H. Spinka, T. D S Stanislaus, A. Starostin, H. M. Staudenmaier, I. Supek, W. B. Tippens

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

A new upper limit is presented for the branching ratio (BR) of Ε↠3Î. This decay is not allowed by charge-conjugation invariance. We have determined that BR(Ε⠆ 3Î)<4à 10-5. We also obtained BR(Ε⠆ Ï€0Π↠3Î)<9Ã- 10-5; this decay mode is absolutely forbidden, as it violates conservation of angular momentum. Finally, we have established that BR(Ε↠π0Ï€0Î Î)<1.2à 10-3 in a restricted diphoton-energy region. All three upper limits are at the 90% confidence level. They were obtained by using the Crystal Ball multiphoton spectrometer at the AGS and are based on the analysis of 28 million Ε mesons produced in the Ï€-p↠Εn reaction close to threshold.

Original languageEnglish (US)
Article number035212
JournalPhysical Review C - Nuclear Physics
Volume72
Issue number3
DOIs
StatePublished - Sep 2005

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'Search for the forbidden decays Ε↠3Î and Ε↠π0Î and the rare decay Ε↠π0Ï€0Î Î'. Together they form a unique fingerprint.

  • Cite this

    Nefkens, B. M. K., Prakhov, S., Allgower, C. E., Bekrenv, V., Briscoe, W. J., Clajus, M., Comfort, J. R., Craig, K., Grosnick, D., Isenhower, D., Knecht, N., Koetke, D., Koulbardis, A., Kozlenko, N., Kruglov, S., Lolos, G., Lopatin, I., Manley, D. M., Manweiler, R., ... Tippens, W. B. (2005). Search for the forbidden decays Ε↠3Î and Ε↠π0Î and the rare decay Ε↠π0Ï€0Î Î. Physical Review C - Nuclear Physics, 72(3), [035212]. https://doi.org/10.1103/PhysRevC.72.035212