Production properties of K*(892) vector mesons and their spin alignment as measured in the NOMAD experiment

First measurements of K*(892) mesons production properties and their spin alignment in nu_mu charged current (CC) and neutral current (NC) interactions are presented. The analysis of the full data sample of the NOMAD experiment is performed in different kinematic regions. For K*+ and K*- mesons prod...

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Detalles Bibliográficos
Autores principales: Chukanov, A., Naumov, D., Popov, B., Astier, P., Autiero, D., Baldisseri, A., Baldo-Ceolin, M., Banner, M., Bassompierre, G., Benslama, K., Besson, N., Bird, I., Blumenfeld, Barry J., Bobisut, F., Bouchez, J., Boyd, S., Bueno, A., Bunyatov, S., Camilleri, L., Cardini, A., Cattaneo, P.W., Cavasinni, V., Cervera-Villanueva, A., Challis, R., Collazuol, G., Conforto, G., Conta, C., Contalbrigo, M., Cousins, R., Daniels, D., Degaudenzi, H., Dignan, T., Di Lella, L., do Couto e Silva, E., Dumarchez, J., Ellis, Malcolm, Feldman, G.J., Ferrari, R., Ferrere, D., Flaminio, V., Fraternali, M., Gaillard, J.-M., Gangler, E., Geiser, A., Geppert, D., Gibin, D., Gninenko, S., Godley, A., Gomez-Cadenas, J.-J., Gosset, J., Gossling, C., Gouanere, M., Grant, A., Graziani, G., Guglielmi, A., Hagner, C., Hernando, J., Hubbard, D., Hurst, P., Hyett, N., Iacopini, E., Joseph, C., Juget, F., Kent, N., Kirsanov, M., Klimov, O., Kokkonen, J., Kovzelev, A., Krasnoperov, A., Lacaprara, S., Lachaud, C., Lakic, B., Lanza, A., La Rotonda, L., Laveder, M., Letessier-Selvon, A., Levy, J.-M., Linssen, L., Ljubicic, A., Long, J., Lupi, A., Lyubushkin, V., Marchionni, A., Martelli, F., Mechain, X., Mendiburu, J.-P., Meyer, J.-P., Mezzetto, M., Mishra, S.R., Moorhead, G.F., Nedelec, P., Nefedov, Yu., Nguyen-Mau, C., Orestano, D., Pastore, F., Peak, L.S., Pennacchio, E., Pessard, H., Petti, R., Placci, A., Polesello, G., Pollmann, D., Polyarush, A., Poulsen, C., Rebuffi, L., Reno, R., Rico, J., Riemann, P., Roda, C., Rubbia, A., Salvatore, F., Samoylov, O., Schahmaneche, K., Schmidt, B., Schmidt, T., Sconza, A., Sevior, M., Sillou, D., Soler, F.J.P., Sozzi, G., Steele, D., Stiegler, U., Stipcevic, M., Stolarczyk, Th., Tareb-Reyes, M., Taylor, G.N., Tereshchenko, V., Toropin, A., Touchard, A.-M., Tovey, S.N., Tran, M.-T., Tsesmelis, E., Ulrichs, J., Vacavant, L., Valdata-Nappi, M., Valuev, V., Vannucci, F., Varvell, K.E., Veltri, M., Vercesi, V., Vidal-Sitjes, G., Vieira, J.-M., Vinogradova, T., Weber, F.V., Weisse, T., Wilson, F.F., Winton, L.J., Yabsley, Bruce D., Zaccone, H., Zei, R., Zuber, K., Zuccon, P.
Lenguaje:eng
Publicado: 2006
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1140/EPJC/S2006-02500-4
http://cds.cern.ch/record/944475
Descripción
Sumario:First measurements of K*(892) mesons production properties and their spin alignment in nu_mu charged current (CC) and neutral current (NC) interactions are presented. The analysis of the full data sample of the NOMAD experiment is performed in different kinematic regions. For K*+ and K*- mesons produced in nu_mu CC interactions and decaying into K0 pi+/- we have found the following yields per event: (2.6 +/- 0.2 (stat.) +/- 0.2 (syst.))% and (1.6 +/- 0.1 (stat.) +/- 0.1 (syst.))% respectively, while for the K*+ and K*- mesons produced in nu NC interactions the corresponding yields per event are: (2.5 +/- 0.3 (stat.) +/- 0.3 (syst.))% and (1.0 +/- 0.3 (stat.) +/- 0.2 (syst.))%. The results obtained for the rho00 parameter, 0.40 +/- 0.06 (stat) +/- 0.03 (syst) and 0.28 +/- 0.07 (stat) +/- 0.03 (syst) for K*+ and K*- produced in nu_mu CC interactions, are compared to theoretical predictions tuned on LEP measurements in e+e- annihilation at the Z0 pole. For K*+ mesons produced in nu NC interactions the measured rho00 parameter is 0.66 +/- 0.10 (stat) +/- 0.05 (syst).

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