1. Observation of neutrino induced diffractive D-s*(+) production and subsequent decay D-s*(+)-> D-s(+)->tau(+)->mu(+)
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P. Annis, S. Aoki, A. Artamonov, E. Barbuto, A. d. Bartolomeo, D. Bonekamper, C. Bozza, C. Brooijmans, J. Brunner, A. Bulte, S. Buontempo, A. Capone, F. Cassol, M. G. Catanesi, M. Chikawa, A. Cocco, D. Cussans, N. D'Ambrosio, R. v. Dantzig, G. D. Lellis, D. D. Pedis, E. D. Capua, U. Dore, R. E. Aidi, A. Ereditato, D. Favart, R. Ferreira, D. Frekers, J. Goldberg, P. Gorbunov, G. Gregoire, G. Grella, T. Hara, J. Herin, K. Hoshino, G. Iovane, Y. Ishii, M. d. Jong, T. Kawamura, A. Kayis, M. Kazuno, V. Khovansky, K. Kodama, M. Komatsu, J. Konijn, Y. Kotaka, T. Kozaki, M. Litmaath, P. F. Loverre, L. Ludovici, M. Meinhard, O. Melzer, M. Messina, P. Migliozzi, M. Miyanishi, M. T. Muciaccia, K. Nakamura, M. Nakamura, T. Nakano, E. Niu, K. Niu, K. Niwa, Y. Obayashi, S. Ogawa, T. Okusawa, R. G. C., G. Onengut, H. Overas, J. Panman, I. M. Papadopoulos, I. G. Park, E. Pesen, G. Piredda, C. A. F., E. Radicioni, S. Ricciardi, P. Righini, G. Romano, D. Rondeshagen, G. Rosa, D. Saltzberg, B. Saitta, R. Santacesaria, O. Sato, Y. Sato, A. Satta, V. Shamanov, H. Shibuya, S. Simone, J. S. Song, S. Sorrentino, P. Strolin, I. Tezuka, V. Tioukov, P. Tolun, T. Toshito, R. Tsenov, J. W. E., N. Ushida, M. V. Dockt, B. V. de, P. Vilain, J. L. Visschers, L. Vivolo, C. Weinheimer, G. Wilquet, K. Winter, T. Wolff, H. Wong, C. S. Yoon, M. T. Zeyrek, P. Zucchelli, FIORILLO, GIULIANA, PALLADINO, VITTORIO, P., Anni, S., Aoki, A., Artamonov, E., Barbuto, A. d., Bartolomeo, D., Bonekamper, C., Bozza, C., Brooijman, J., Brunner, A., Bulte, S., Buontempo, A., Capone, F., Cassol, M. G., Catanesi, M., Chikawa, A., Cocco, D., Cussan, N., D'Ambrosio, R. v., Dantzig, G. D., Lelli, D. D., Pedi, E. D., Capua, U., Dore, R. E., Aidi, A., Ereditato, D., Favart, R., Ferreira, Fiorillo, Giuliana, D., Freker, J., Goldberg, P., Gorbunov, G., Gregoire, G., Grella, T., Hara, J., Herin, K., Hoshino, G., Iovane, Y., Ishii, M. d., Jong, T., Kawamura, A., Kayi, M., Kazuno, V., Khovansky, K., Kodama, M., Komatsu, J., Konijn, Y., Kotaka, T., Kozaki, M., Litmaath, P. F., Loverre, L., Ludovici, M., Meinhard, O., Melzer, M., Messina, P., Migliozzi, M., Miyanishi, M. T., Muciaccia, K., Nakamura, M., Nakamura, T., Nakano, E., Niu, K., Niu, K., Niwa, Y., Obayashi, S., Ogawa, T., Okusawa, R. G., C., G., Onengut, H., Overa, Palladino, Vittorio, J., Panman, I. M., Papadopoulo, I. G., Park, E., Pesen, G., Piredda, C. A., F., E., Radicioni, S., Ricciardi, P., Righini, G., Romano, D., Rondeshagen, G., Rosa, D., Saltzberg, B., Saitta, R., Santacesaria, O., Sato, Y., Sato, A., Satta, V., Shamanov, H., Shibuya, S., Simone, J. S., Song, S., Sorrentino, P., Strolin, I., Tezuka, V., Tioukov, P., Tolun, T., Toshito, R., Tsenov, J. W., E., N., Ushida, M. V., Dockt, B. V., De, P., Vilain, J. L., Visscher, L., Vivolo, C., Weinheimer, G., Wilquet, K., Winter, T., Wolff, H., Wong, C. S., Yoon, M. T., Zeyrek, and P., Zucchelli
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PHYSICS ,FRAGMENTATION ,VECTOR-MESONS - Abstract
We report on the first direct observation of a neutrino induced charged-current interaction with two subsequent decays of short-lived particles close to the interaction vertex. This rare double-kink signature in the CHORUS emulsion target is interpreted as a D-s*(+) production followed by the decay chain D-s*(+) --> D-s(+) gamma, D-s(+) --> tau(+) v(tau),tau(+) --> mu(+) v(mu)v(tau). The event is characterised by small Q(2) and small four-momentum transfer squared t to the target nucleon, which indicates a diffractive production mechanism. A complete analysis of the event is presented. (C) 1998 Elsevier Science B.V. All rights reserved.
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- 1998