Measurement of the inclusive b→ τνX branching ratio

• Published in: Physics letters. B Vol. 332; no. 1; pp. 201 - 208
• Main Authors: Adam, A., Aloisio, A., Ambrosi, G., An, Q., Alkhazov, G., Baba, P.V.K.S., Bakken, J.A., Ball, R.C., Banerjee, S., Barillère, R., Bay, A., Bencze, Gy.L., Biland, A., Blaising, J.J., Bourilkov, D., Bourquin, M., Brock, I.C., Burger, W.J., Cai, X.D., Carlino, G., Castello, R., Chen, C., Chen, G., Dova, M.T., Drago, E., Easo, S., Engler, A., Fabbretti, R., Fesefeldt, H., Fiandrini, E., Forconi, G., Fredj, L., Gerald, J., Giagu, S., Gong, Z.F., Goujon, D., Gruenewald, M., Hebbeker, T., Hervé, A., Hou, S.R., Jones, L.W., Josa-Mutuberria, I., Kasser, A., Kapinos, P., Kim, D., Kinnison, W.W., Lecoq, P., Leggett, C., Lin, W.T., Lohmann, W., Lu, Y.S., Luci, C., Lustermann, W., MacDermott, M., Martin, J.P., Morganti, S., Nagy, E., Napolitano, M., Passaleva, G., Paus, C., Perrier, J., Piccolo, D., Pinto, J.C., Pojidaev, V., Rahal-Callot, G., Read, K., Ricker, A., Rind, O., Rosier-Lees, S., Rubio, J.A., Shotkin, S., Schulte, R., Schwering, G., Sens, J.C., Servoli, L., Sopczak, A., Steuer, M., Sudhakar, K., Swain, J.D., Ting, Samuel C.C., Tonwar, S.C., Tuuva, T., Ulbricht, J., Viertel, G., Vikas, P., Vivargent, M., Vogt, H., Vorobyov, A.A., Wallraff, W., Wang, Y.F., Wenninger, J., Wittgenstein, F., Wu, S.X., Yang, C.G., Yang, G., Zhang, D.H., Zhou, B., Zhou, G.J., Zhu, R.Y., van der Zwaan, B.C.C.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.07.1994; Elsevier Science
• Subjects: Decays of intermediate bosons; Decays of z bosons; Exact sciences and technology; Physics; Specific reactions and phenomenology; The physics of elementary particles and fields; Branching ratio; Leptons; Bias; Particle decay; Elementary particles; Bosons
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(94)90880-X

Using the L3 detector, the branching ratio BR( b → πνX) has been measured using a sample of Z → b b events tagged by high momentum and high transverse momentum leptons in one hemisphere and with missing energy in the opposite hemisphere. From a sample of 948 000 hadronic events we find BR( b → πνX) = (2.4 ± 0.7 (stat.) ± 0.8 (syst.))%.