Energy scan for narrow states in e +e − annihilation at C.M. energies between 29.90 and 31.46 GeV

• Published in: Physics letters. B Vol. 88; no. 1; pp. 199 - 202
• Main Authors: Brandelik, R., Braunschweig, W., Gather, K., Kadansky, V., Lübelsmeyer, K., Mättig, P., Martyn, H.-U., Peise, G., Rimkus, J., Sander, H.G., Schmitz, D., Schultz von Dratzig, A., Trines, D., Wallraff, W., Boerner, H., Fischer, H.M., Hartmann, H., Hilger, E., Hillen, W., Knop, G., Leu, P., Löhr, B., Wedemeyer, R., Wermes, N., Wollstadt, M., Cassel, D.G., Heyland, D., Hultschig, H., Joos, P., Koch, W., Koehler, P., Kötz, U., Kowalski, H., Ladage, A., Lüke, D., Lynch, H.L., Mikenberg, G., Notz, D., Pyrlik, J., Riethmüller, R., Schliwa, M., Söding, P., Wiik, B.H., Wolf, G., Fohrmann, R., Holder, M., Poelz, G., Ringel, J., Römer, O., Rüsch, R., Schmüser, P., Binnie, D.M., Dornan, P.J., Downie, N.A., Garbutt, D.A., Jones, W.G., Lloyd, S.L., Pandoulas, D., Sedgbeer, J., Yanker, S., Youngman, C., Barlow, R.J., Cashmore, R.J., Illingworth, J., Ogg, M., Roe, B., Salmon, G.L., Bell, K.W., Chinowsky, W., Foster, B., Hart, J.C., Proudfoot, J., Quarrie, D.R., Saxon, D.H., Woodworth, P.L., Eisenberg, Y., Karshon, U., Revel, D., Ronat, E., Shapira, A., Freeman, J., Lecomte, P., Meyer, T., Lan Wu, Sau, Zobernig, G.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.1979
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(79)90145-X

A fine energy scan has been performed to search for narrow states in e +e − annihilation at c.m. energies between 29.90 and 31.46 GeV. No such state has been observed. The 90% confidence upper limit on the leptonic decay width times the hadronic decay branching ratio is Γ ee B h <1.6 keV.