1. Determination of D-meson lifetimes
- Author
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T. Handler, J. Salicio, H. Briand, R. Raghavan, U. Trevisan, E. P. Kistenev, C. Troncon, E. Di Capua, Simonetta Gentile, A. Michalon, B. Sellden, C. Defoix, P. Poropat, B. M. Whyman, P. V. Chliapnikov, M. Pernicka, J. R. Fry, V. Canale, Josef Hrubec, L. de Billy, S. Kitamura, E. Johanson, N. Colino, Gianni Zumerle, B. Vonck, D. B. Gibaut, Louis Lyons, J. L. Bailly, C. Pinori, V. A. Stopchenko, Y. Iga, C. Fernandez, V. V. Kniazev, S. Banerjee, H. Nowak, A. De Angelis, L. Haupt, L. Montanet, U. Gasparini, A. T. Goshaw, H. Leutz, Paolo Checchia, T. Moa, M. Mazzucato, J. Lemonne, K. Shankar, C. Caso, P. Wright, S. Falciano, J. Dumarchez, S. Squarcia, P. Mason, S-O. Holmgren, Alan Poppleton, J. Panella, S. N. Ganguli, J. Kesteman, R. Dimarco, M. Iori, Flavio Fontanelli, Yu Fisyak, R. Bizzarri, L. Ventura, Edoardo Castelli, E. Jegham, A. Subramanian, D. Huss, A. Gurtu, Evgueni Vlasov, F. Marchetto, S. Nilsson, R. Hamatsu, Giorgio Borreani, G. D. Patel, M. MacDermott, T. Tsurugai, M. Begalli, V.A. Uvarov, G. Otter, J. Dolbeau, I. Kita, P. Pilette, M. A. Houlden, W. Struczinski, H. Rohringer, Sten Hellman, C. Fisher, N. Oshima, P. E. Stamer, M. Laloum, P. Hughes, M. Aguilar-Benitez, Reinhard W. Schulte, R. Monge, J. Wickens, W. M. Bugg, Pierre Vilain, P. Belliere, W. Bartl, E. L. Hart, M. E. Michalon-Mentzer, A. Roth, G. Neuhofer, K. Sudhakar, R. Contri, K. Roberts, T. Yamagata, H. K. Nguyen, D. Kuhn, W.W.M. Allison, J. J. Hernandez, C. Voltolini, M. Sessa, R.J. Plano, I. Josa, M. C. Touboul, S. Reucroft, Fernand Grard, D. Crennell, B. Epp, G. Piredda, P. K. Malhotra, J. F. Baland, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Aguilar Benitez, M., and Canale, Vincenzo
- Subjects
Physics ,Particle physics ,Physics and Astronomy (miscellaneous) ,010308 nuclear & particles physics ,High resolution ,Elementary particle ,01 natural sciences ,0103 physical sciences ,Decay length ,D meson ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Hydrogen bubble ,010306 general physics ,Engineering (miscellaneous) ,Particle Physics - Experiment - Abstract
D-meson lifetimes have been determined from decays observed in an exposure of the high resolution hydrogen bubble chamber LEBC in association with the European Hybrid Spectrometer (EHS) to an incident 360 GeV π− beam. Various techniques for lifetime determination are presented and the results compared. A new model-independent analysis based on the distribution in transverse decay length is introduced and preferred over other techniques. Best values are found to be: $$\begin{gathered} \tau (D^0 ) = \left( {4.1_{ - 0.3}^{ + 0.7} } \right) \times 10^{ - 13} s (60 decays) \hfill \\ \tau (D^ \pm ) = \left( {10.7_{ - 1.8}^{ + 2.8} } \right) \times 10^{ - 13} s (40 decays) \hfill \\ \end{gathered} $$ . The lifetime ratio is: $$T = \frac{{\tau (D^ \pm )}}{{\tau (D^0 )}} = 2.6_{ - 0.6}^{ + 0.8} $$ .
- Published
- 1987