Measurement of branching ratios

H. Aihara, M. Alston-Garnjost, R. E. Avery, J. A. Bakken, A. Barbaro-Galtieri, A. R. Barker, A. V. Barnes, B. A. Barnett, B. A. Barnett, D. A. Bauer, H. U. Bengtsson, D. L. Bintinger, G. J. Bobbink, T. S. Bolognese, A. D. Bross, C. D. Buchanan, A. Buijs, D. O. Caldwell, C. Y. Chien, A. R. ClarkG. D. Cowan, D. A. Crane, O. I. Dahl, K. A. Derby, J. J. Eastman, T. K. Edberg, P. H. Eberhard, A. M. Eisner, R. Enomoto, F. C. Erné, T. Fujii, J. W. Gary, W. Gorn, J. M. Hauptman, W. Hofmann, J. E. Huth, J. Hylen, T. Kamae, H. S. Kaye, K. H. Kees, R. W. Kenney, L. T. Kerth, Winston Ko, R. I. Koda, R. R. Kofler, K. K. Kwong, R. L. Lander, W. G.J. Langeveld, J. G. Layter, F. L. Linde, C. S. Lindsey, S. C. Loken, A. Lu, X. Q. Lu, G. R. Lynch, L. Madansky, R. J. Madaras, K. Maeshima, B. D. Magnuson, J. N. Marx, G. E. Masek, L. G. Mathis, J. A.J. Matthews, S. J. Maxfield, S. O. Melnikoff, E. S. Miller, W. Moses, R. R. McNeil, P. Nemethy, D. R. Nygren, P. J. Oddone, H. P. Paar, D. A. Park, S. K. Park, D. E. Pellett, A. Pevsner, M. Pripstein, M. T. Ronan, R. R. Ross, F. R. Rouse, K. A. Schwitkis, J. C. Sens, G. Shapiro, M. D. Shapiro, B. C. Shen, W. E. Slater, J. R. Smith, J. S. Steinman, M. L. Stevenson, D. H. Stork, M. G. Strauss, M. K. Sullivan, T. Takahashi, J. R. Thompson, N. Toge, S. Toutounchi, R. Van Tyen, B. Van Uitert, G. J. VanDalen, R. F. Van Daalen Wetters, W. Vernon, W. Wagner, E. M. Wang, Y. X. Wang, M. R. Wayne, W. A. Wenzel, J. T. White, M. C.S. Williams, Z. R. Wolf, H. Yamamoto, S. J. Yellin, C. Zeitlin, W. M. Zhang

    Research output: Contribution to journalArticle

    Abstract

    We have measured the branching ratios for several decay modes. We use e+e-+- events accumulated with the TPC/Two-Gamma facility at the SLAC e+e- storage ring PEP. The data correspond to an integrated luminosity of 77 pb-1 at a center-of-mass energy of 29 GeV. The one- and three-charged-particle inclusive branching ratios of the decay are measured to be B1=(84.7±1.0)% and B3=(15.1±1.0)%, where B1+B3 is constrained to be 99.85%. The branching ratios of the two leptonic decay modes are B(-e- 1/2»e1/2)=(18.4±1. 6)% and B(-'1/4- 1/2»1/41/2)=(17.7±1.4)%. If we then assume lepton universality, we obtain B(-e- 1/2e1/2)=(18.3±0.9)% and B(-'1/4- 1/2»1/41/2)=(17.8±0.9)%. We measure the Cabibbo-allowed semihadronic decay mode B(--+neutral particles)=(47.0±1.5)%, and the Cabibbo-suppressed decay mode B(-K-+neutral particles)=(1.6±0.4)%. By looking for associated photons, we find B(-K-0+neutral particles) to be (1.2±0.6)%. Using the channel K*-KSO+-, we find B(-K*-(892)+neutral particles)=(1.4±0.9)%. The quoted errors are the combined statistical and systematic errors.

    Original languageEnglish (US)
    Pages (from-to)1553-1561
    Number of pages9
    JournalPhysical Review D
    Volume35
    Issue number5
    DOIs
    StatePublished - Jan 1 1987

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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    Aihara, H., Alston-Garnjost, M., Avery, R. E., Bakken, J. A., Barbaro-Galtieri, A., Barker, A. R., Barnes, A. V., Barnett, B. A., Barnett, B. A., Bauer, D. A., Bengtsson, H. U., Bintinger, D. L., Bobbink, G. J., Bolognese, T. S., Bross, A. D., Buchanan, C. D., Buijs, A., Caldwell, D. O., Chien, C. Y., ... Zhang, W. M. (1987). Measurement of branching ratios. Physical Review D, 35(5), 1553-1561. https://doi.org/10.1103/PhysRevD.35.1553