Leptonic decays of the - And - hyperons

W. Tanenbaum, V. Hungerbhler, R. Majka, J. N. Marx, P. Némethy, J. Sandweiss, W. J. Willis, M. Atac, S. Ecklund, P. J. Gollon, J. Lach, J. MacLachlan, A. Roberts, R. Stefanski, D. Theriot, C. L. Wang

    Research output: Contribution to journalArticle


    The decays - ne-», - e-» (-p), and e-» (-p) were studied using unpolarized hyperons from the Yale-Fermilab-BNL hyperon beam at the Brookhaven National Laboratory Alernating Gradient Synchrotron. The -, -, e-, and -decay-product momenta were measured by magnetic spectrometers with magnetostrictive wire spark chambers. A threshold Cerenkov counter and a total absorption calorimeter identified the electron and neutron, respectively. From a sample of 3507 reconstructed - ne-» events we have found gAgV=0.4350.035. From a sample of 55 reconstructed e-» events we have found gVgA=-0.170.35 assuming that the conserved vector current hypothesis correctly predicts the weak magnetic form factor. A new one-angle Cabibbo fit gives f=0.4360.010, d=0.8120.011, and,=0.2320.003 radian.

    Original languageEnglish (US)
    Pages (from-to)1871-1883
    Number of pages13
    JournalPhysical Review D
    Issue number7
    StatePublished - Jan 1 1975


    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Physics and Astronomy (miscellaneous)

    Cite this

    Tanenbaum, W., Hungerbhler, V., Majka, R., Marx, J. N., Némethy, P., Sandweiss, J., Willis, W. J., Atac, M., Ecklund, S., Gollon, P. J., Lach, J., MacLachlan, J., Roberts, A., Stefanski, R., Theriot, D., & Wang, C. L. (1975). Leptonic decays of the - And - hyperons. Physical Review D, 12(7), 1871-1883. https://doi.org/10.1103/PhysRevD.12.1871