Updated measurement of the average b hadron lifetime

• Published in: Physics letters. B Vol. 295; no. 1; pp. 174 - 186
• Main Authors: Buskulic, D., Ariztizabal, F., Comas, P., Farilla, A., Iaselli, G., Maggi, G., Quattromini, M., Silvestris, L., Zito, G., Hu, H., Lin, J., Wang, T., Xu, D., Bonvicini, G., Boudreau, J., Jacobsen, R., Lançon, E., Lehraus, I., Lohse, T., Lusiani, A., Schlatter, D., Wildish, T., Wotschack, J., Ajaltouni, Z., Badaud, F., Gay, P., Henrad, P., Perret, P., Stimpfl, G., Fearnley, T., Efthymiopoulos, I., Kyriakis, A., Bonneaud, G., Brient, J.C., Rumpf, M., Veitch, E., Corden, M., Ikeda, M., Bologna, G., Capon, G., Chiarella, V., Murtas, F., Colrain, P., ten Have, I., Raine, C., Smith, K., Hepp, V., Wunsch, M., Belk, A.T., Beuselinck, R., Greene, A.M., Hassard, J.F., Patton, S.J., Jackson, D., Keemer, N.R., Snow, S.W., Raab, J., Renk, B., Schmidt, H., Wolf, B., Drinkard, J., Roos, L., Rousseau, D., Schwemling, P., Talby, M., Cattaneo, P., Cowan, G., Dehning, B., Schwarz, A.S., Seywerd, H., Denis, R.St, Callot, O., Janot, P., Kim, D.W., Lefrançois, J., Schune, M.-H., Batignani, G., Ciocci, M.A., Giorgi, M.A., Mannelli, E.B., Messineo, A., Sanguinetti, G., Steinberger, J., Vannini, C., Venturi, A., Verdini, P.G., Clifft, R.W., Colas, P., Duarte, H., Roussarie, A., Taylor, G., Wear, J., Ashman, J.G., Booth, C.N., Böhrer, A., Schäfer, U., Gobbo, B., Cinabro, D., Gao, Y.S., Pater, J.R.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 26.11.1992; Elsevier Science; Elsevier
• Subjects: Decays of intermediate bosons; Exact sciences and technology; High Energy Physics - Experiment; Physics; Specific reactions and phenomenology; The physics of elementary particles and fields; Particle desintegration; Lifetime; Experimental test; Boson; Elementary particle
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(92)90108-G

An improved measurement of the average lifetime of b hadrons has been performed with the ALEPH detector. From a sample of 260 000 hadronic Z 0 decays, recorded during the 1991 LEP run with the silicon vertex detector fully operational, a fit to the impact parameter distribution of lepton tracks coming from semileptonic decays yields an average b hadron lifetime of 1.49 ± 0.03 ± 0.06 ps.