From a sample of about 160k Z --> tau(+)tau(-) candidates collected with the ALEPH detector at LEP between 1991 and 1995, tau lepton decays involving K-S(0) --> pi(+)pi(-) are studied. The (KSKL0)-K-0 associated production in 7 decays is also investigated. The branching ratios are measured for the inclusive decay B(tau(-) --> K(S)(0)X(-)nu(tau)) = (9.70 +/- 0.58 +/- 0.62) x 10(-3), where X- can be anything, and for the exclusive decays B(tau(-) --> (K) over bar(0) pi(-)nu(tau) = (8.55+/-1.17+/-0.66) x 10(-3), B(tau(-) --> (K) over bar(0) pi(-)pi(0)nu(tau)) = (2.94 +/- 0.73 +/- 0.37) x 10(-3), B(tau(-) --> (K) over bar(0)K(-)nu(tau)) = (1.58 +/- 0.42 +/- 0.17) x 10(-3), B(tau(-) --> (K) over bar(0)K(-)pi(0)nu(tau)) = (1.52 +/- 0.76 +/- 0.21) x 10(-3). The decay tau(-) --> K(S)(0)K(L)(0)pi(-)nu(tau) is studied for the first time, giving a branching ratio B(tau(-) --> K(S)(0)K(L)(0)pi(-)nu(tau)) = (1.01 +/- 0.23 +/- 0.13) x 10(-3). The channels tau(-) --> K(S)(0)K(S)(0)pi(-)nu(tau), tau(-) --> K(S)(0)K(S)(0)pi(-)pi(0)nu(tau), tau(-) --> K(S)(0)K(L)(0)pi(-)pi(0)nu(tau), tau- --> (K) over bar(0) pi(-)pi(0)nu(tau), tau(-) --> K(0)K(-)pi(0)pi(0)nu(tau) and tau- --> K(0)h(+)h(-)h(-)v(tau) are also investigated. In addition, mass spectra in the K(S)(0)h(-) and K(S)(0)h(-)pi(0) final states are analysed to provide information on the intermediate states produced in the decays.

K-S(0) production in tau decays / R. Barate, D. Buskulic, D. Decamp, P. Ghez, C. Goy, J. Lees, A. Lucotte, M. Minard, J. Nief, B. Pietrzyk, G. Boix, M. Casado, M. Chmeissani, J. Crespo, M. Delfino, E. Fernandez, M. Fernandez-Bosman, L. Garrido, E. Grauges, A. Juste, M. Martinez, G. Merino, R. Miquel, L. Mir, I. Park, A. Pascual, J. Perlas, I. Riu, F. Sanchez, A. Colaleo, D. Creanza, M. de Palma, G. Gelao, G. Iaselli, G. Maggi, M. Maggi, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, A. Tricomi, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, R. Alemany, U. Becker, P. Bright-Thomas, D. Casper, M. Cattaneo, F. Cerutti, V. Ciulli, G. Dissertori, H. Drevermann, R. Forty, M. Frank, R. Hagelberg, J. Hansen, J. Harvey, P. Janot, B. Jost, I. Lehraus, P. Mato, A. Minten, L. Moneta, A. Pacheco, J. Pusztaszeri, F. Ranjard, L. Rolandi, D. Rousseau, D. Schlatter, M. Schmitt, O. Schneider, W. Tejessy, F. Teubert, I. Tomalin, H. Wachsmuth, A. Wagner, Z. Ajaltouni, F. Badaud, G. Chazelle, O. Deschamps, A. Falvard, C. Ferdi, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, S. Monteil, J. Montret, D. Pallin, P. Perret, F. Podlyski, J. Proriol, P. Rosnet, T. Fearnley, J. Hansen, J. Hansen, P. Hansen, B. Nilsson, B. Rensch, A. Waananen, G. Daskalakis, A. Kyriakis, C. Markou, E. Simopoulou, I. Siotis, A. Vayaki, A. Blondel, G. Bonneaud, J. Brient, P. Bourdon, A. Rouge, M. Rumpf, A. Valassi, M. Verderi, H. Videau, T. Boccali, E. Focardi, G. Parrini, K. Zachariadou, M. Corden, C. Georgiopoulos, D. Jaffe, A. Antonelli, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, V. Chiarella, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G. Murtas, L. Passalacqua, M. Pepe-Altarelli, S. Salomone, L. Curtis, S. Dorris, A. Halley, J. Lynch, P. Negus, V. O'Shea, C. Raine, J. Scarr, K. Smith, P. Teixeira-Dias, A. Thompson, E. Thomson, F. Thomson, O. Buchmuller, S. Dhamotharan, A. Geweniger, G. Graefe, P. Hanke, G. Hansper, V. Hepp, E. Kluge, A. Putzer, J. Sommer, K. Tittel, S. Werner, M. Wunsch, R. Beuselinck, D. Binnie, W. Cameron, P. Dornan, M. Girone, S. Goodsir, E. Martin, N. Marinelli, A. Moutoussi, J. Nash, J. Sedgbeer, P. Spagnolo, M. Williams, V. Ghete, P. Girtler, E. Kneringer, D. Kuhn, G. Rudolph, A. Betteridge, C. Bowdery, P. Buck, P. Colrain, G. Crawford, A. Finch, F. Foster, G. Hughes, R. Jones, M. Williams, I. Giehl, A. Greene, C. Hoffmann, K. Jakobs, K. Kleinknecht, G. Quast, B. Renk, E. Rohne, H. Sander, P. van Gemmeren, C. Zeitnitz, J. Aubert, C. Benchouk, A. Bonissent, G. Bujosa, J. Carr, P. Coyle, F. Etienne, O. Leroy, F. Motsch, P. Payre, M. Talby, A. Sadouki, M. Thulasidas, K. Trabelsi, M.R.A. Aleppo, M. Antonelli, F. Ragusa, R. Berlich, W. Blum, V. Buscher, H. Dietl, G. Ganis, C. Gotzhein, H. Kroha, G. Lutjens, G. Lutz, C. Mannert, W. Manner, H. Moser, R. Richter, A. Rosado-Schlosser, S. Schael, R. Settles, H. Seywerd, H. Stenzel, W. Wiedenmann, G. Wolf, J. Boucrot, O. Callot, S. Chen, Y. Choi, Y. Cordier, M. Davier, L. Duflot, J. Grivaz, P. Heusse, A. Hocker, A. Jacholkowska, D. Kim, F. Le Diberder, J. Lefrancois, A. Lutz, L. Nikolic, M. Schune, E. Tournefier, J. Veillet, I. Videau, D. Zerwas, P. Azzurri, G. Bagliesi, G. Batignani, S. Bettarini, C. Bozzi, G. Calderini, M. Carpinelli, M. Ciocci, R. Dell'Orso, R. Fantechi, I. Ferrante, L. Foa, F. Forti, A. Giassi, M. Giorgi, A. Gregorio, F. Ligabue, A. Lusiani, P. Marrocchesi, A. Messineo, F. Palla, G. Rizzo, G. Sanguinetti, A. Sciaba, J. Steinberger, R. Tenchini, G. Tonelli, C. Vannini, A. Venturi, P. Verdini, G. Blair, L. Bryant, J. Chambers, M. Green, T. Medcalf, P. Perrodo, J. Strong, J. von Wimmersperg-Toeller, D. Botterill, R. Clifft, T. Edgecock, S. Haywood, P. Norton, J. Thompson, A. Wright, B. Bloch-Devaux, P. Colas, S. Emery, W. Kozanecki, E. Lancon, M. Lemaire, E. Locci, P. Perez, J. Rander, J. Renardy, A. Roussarie, J. Schuller, J. Schwindling, A. Trabelsi, B. Vallage, S. Black, J. Dann, R. Johnson, H. Kim, N. Konstantinidis, A. Litke, M. McNeil, G. Taylor, C. Booth, C. Brew, S. Cartwright, F. Combley, M. Kelly, M. Lehto, J. Reeve, L. Thompson, K. Affholderbach, A. Bohrer, S. Brandt, G. Cowan, C. Grupen, P. Saraiva, L. Smolik, F. Stephan, M. Apollonio, L. Bosisio, R. Della Marina, G. Giannini, B. Gobbo, G. Musolino, J. Rothberg, S. Wasserbaech, S. Armstrong, E. Charles, P. Elmer, D. Ferguson, Y. Gao, S. Gonzalez, T. Greening, O. Hayes, H. Hu, S. Jin, P. McNamara, J. Nachtman, J. Nielsen, W. Orejudos, Y. Pan, Y. Saadi, I. Scott, J. Walsh, S. Wu, X. Wu, J. Yamartino, G. Zobernig. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 4:1(1998), pp. 29-45. [10.1007/s100520050184]

K-S(0) production in tau decays

M.R.A. Aleppo;F. Ragusa;
1998

Abstract

From a sample of about 160k Z --> tau(+)tau(-) candidates collected with the ALEPH detector at LEP between 1991 and 1995, tau lepton decays involving K-S(0) --> pi(+)pi(-) are studied. The (KSKL0)-K-0 associated production in 7 decays is also investigated. The branching ratios are measured for the inclusive decay B(tau(-) --> K(S)(0)X(-)nu(tau)) = (9.70 +/- 0.58 +/- 0.62) x 10(-3), where X- can be anything, and for the exclusive decays B(tau(-) --> (K) over bar(0) pi(-)nu(tau) = (8.55+/-1.17+/-0.66) x 10(-3), B(tau(-) --> (K) over bar(0) pi(-)pi(0)nu(tau)) = (2.94 +/- 0.73 +/- 0.37) x 10(-3), B(tau(-) --> (K) over bar(0)K(-)nu(tau)) = (1.58 +/- 0.42 +/- 0.17) x 10(-3), B(tau(-) --> (K) over bar(0)K(-)pi(0)nu(tau)) = (1.52 +/- 0.76 +/- 0.21) x 10(-3). The decay tau(-) --> K(S)(0)K(L)(0)pi(-)nu(tau) is studied for the first time, giving a branching ratio B(tau(-) --> K(S)(0)K(L)(0)pi(-)nu(tau)) = (1.01 +/- 0.23 +/- 0.13) x 10(-3). The channels tau(-) --> K(S)(0)K(S)(0)pi(-)nu(tau), tau(-) --> K(S)(0)K(S)(0)pi(-)pi(0)nu(tau), tau(-) --> K(S)(0)K(L)(0)pi(-)pi(0)nu(tau), tau- --> (K) over bar(0) pi(-)pi(0)nu(tau), tau(-) --> K(0)K(-)pi(0)pi(0)nu(tau) and tau- --> K(0)h(+)h(-)h(-)v(tau) are also investigated. In addition, mass spectra in the K(S)(0)h(-) and K(S)(0)h(-)pi(0) final states are analysed to provide information on the intermediate states produced in the decays.
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
1998
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/177585
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