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Measurements of $BR(b \to \tau^{-}\overline{\nu}_{\tau}X)$ and $BR(b \to \tau^{-}\overline{\nu}_{\tau} D^{*\pm}X)$ and Upper Limits on $BR(B^{-} \to \tau^{-}\overline{\nu}_{\tau})$ and $BR(b \to s\nu\overline{\nu})$

Inclusive branching ratios involving b to tau transitions are measured in approximately four million hadronic Z decays collected by the ALEPH detector at LEP. The fully-inclusive branching ratio b -> tau nu X and the semi-inclusive branching ratio b -> tau nu D*+/- X are measured to be (2.43 +...

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Detalles Bibliográficos
Autores principales: Barate, R., Decamp, D., Ghez, Philippe, Goy, C., Lees, J.P., Merle, E., Minard, M.N., Perrodo, P., Pietrzyk, B., Bravo, S., Casado, M.P., Chmeissani, M., Crespo, J.M., Fernandez, E., Fernandez-Bosman, M., Garrido, L., Grauges, E., Martinez, M., Merino, G., Miquel, R., Mir, L.M., Pacheco, A., Pascual, A., Ruiz, H., Colaleo, A., Creanza, D., de Palma, M., Iaselli, G., Maggi, G., Maggi, M., Nuzzo, S., Ranieri, A., Raso, G., Ruggieri, F., Selvaggi, G., Silvestris, L., Tempesta, P., Tricomi, A., Zito, G., Huang, X., Lin, J., Ouyang, Q., Wang, T., Xie, Y., Xu, R., Xue, S., Zhang, J., Zhang, L., Zhao, W., Abbaneo, D., Boix, G., Buchmuller, O., Cattaneo, M., Cerutti, F., Dissertori, G., Drevermann, H., Forty, R.W., Frank, M., Greening, T.C., Hansen, J.B., Harvey, John, Janot, P., Jost, B., Lehraus, I., Mato, P., Minten, A., Moutoussi, A., Ranjard, F., Rolandi, Gigi, Schlatter, D., Schmitt, M., Schneider, O., Spagnolo, P., Tejessy, W., Teubert, F., Tournefier, E., Wright, A.E., Ajaltouni, Z., Badaud, F., Chazelle, G., Deschamps, O., Falvard, A., Gay, P., Guicheney, C., Henrard, P., Jousset, J., Michel, B., Monteil, S., Montret, J.C., Pallin, D., Perret, P., Podlyski, F., Hansen, J.D., Hansen, J.R., Hansen, P.H., Nilsson, B.S., Waananen, A., Daskalakis, G., Kyriakis, A., Markou, C., Simopoulou, E., Vayaki, A., Blondel, A., Bonneaud, G., Brient, J.C., Rouge, A., Rumpf, M., Swynghedauw, M., Verderi, M., Videau, H., Focardi, E., Parrini, G., Zachariadou, K., Antonelli, A., Antonelli, M., Bencivenni, G., Bologna, G., Bossi, F., Campana, P., Capon, G., Chiarella, V., Laurelli, P., Mannocchi, G., Murtas, F., Murtas, G.P., Passalacqua, L., Pepe-Altarelli, M., Halley, A.W., Lynch, J.G., Negus, P., O'Shea, V., Raine, C., Teixeira-Dias, P., Thompson, A.S., Cavanaugh, R., Dhamotharan, S., Geweniger, C., Hanke, P., Hansper, G., Hepp, V., Kluge, E.E., Putzer, A., Sommer, J., Tittel, K., Werner, S., Wunsch, M., Beuselinck, R., Binnie, D.M., Cameron, W., Dornan, P.J., Girone, M., Marinelli, N., Sedgbeer, J.K., Thompson, J.C., Thomson, Evelyn J., Ghete, V.M., Girtler, P., Kneringer, E., Kuhn, D., Rudolph, G., Bowdery, C.K., Buck, P.G., Finch, A.J., Foster, F., Hughes, G., Jones, R.W.L., Robertson, N.A., Giehl, I., Jakobs, K., Kleinknecht, K., Quast, G., Renk, B., Rohne, E., Sander, H.G., Wachsmuth, H., Zeitnitz, C., Bonissent, A., Carr, J., Coyle, P., Leroy, O., Payre, P., Rousseau, D., Talby, M., Aleppo, M., Ragusa, F., Dietl, H., Ganis, G., Heister, A., Huttmann, K., Lutjens, G., Mannert, C., Manner, W., Moser, H.G., Schael, S., Settles, R., Stenzel, H., Wiedenmann, W., Wolf, G., Azzurri, P., Boucrot, J., Callot, O., Chen, S., Cordier, A., Davier, M., Duflot, L., Grivaz, J.F., Heusse, P., Jacholkowska, A., Le Diberder, F., Lefrancois, J., Lutz, A.M., Schune, M.H., Veillet, J.J., Videau, I., Yuan, C., Zerwas, D., Bagliesi, Giuseppe, Boccali, T., Calderini, G., Ciulli, V., Foa, L., Giassi, A., Ligabue, F., Messineo, A., Palla, F., Sanguinetti, G., Sciaba, A., Sguazzoni, G., Tenchini, R., Venturi, A., Verdini, P.G., Blair, G.A., Cowan, G., Green, M.G., Medcalf, T., Strong, J.A., von Wimmersperg-Toeller, J.H., Clifft, R.W., Edgecock, T.R., Norton, P.R., Tomalin, I.R., Bloch-Devaux, Brigitte, Colas, P., Emery, S., Kozanecki, W., Lancon, E., Lemaire, M.C., Locci, E., Perez, P., Rander, J., Renardy, J.F., Roussarie, A., Schuller, J.P., Schwindling, J., Trabelsi, A., Vallage, B., Black, S.N., Dann, J.H., Johnson, R.P., Kim, H.Y., Konstantinidis, N., Litke, A.M., McNeil, M.A., Taylor, G., Booth, C.N., Cartwright, S., Combley, F., Lehto, M., Thompson, L.F., Affholderbach, K., Boehrer, Armin, Brandt, S., Grupen, C., Misiejuk, A., Prange, G., Sieler, U., Giannini, G., Gobbo, B., Rothberg, J., Wasserbaech, S., Armstrong, S.R., Cranmer, K., Elmer, P., Ferguson, D.P.S., Gao, Y., Gonzalez, S., Hayes, O.J., Hu, H., Jin, S., Kile, J., McNamara, P.A., III, Nielsen, J., Orejudos, W., Pan, Y.B., Saadi, Y., Scott, I.J., Walsh, J., Wu, Sau Lan, Wu, X., Zobernig, G.
Lenguaje:eng
Publicado: 2000
Materias:
Acceso en línea:https://dx.doi.org/10.1007/s100520100612
http://cds.cern.ch/record/468150
Descripción
Sumario:Inclusive branching ratios involving b to tau transitions are measured in approximately four million hadronic Z decays collected by the ALEPH detector at LEP. The fully-inclusive branching ratio b -> tau nu X and the semi-inclusive branching ratio b -> tau nu D*+/- X are measured to be (2.43 +/- 0.20 +/- 0.25)% and (0.88 +/- 0.31 +/- 0.28)%, in agreement with the standard model predictions. Upper limits on the branching fractions b -> tau nu and b -> s nu nubar are set to 8.3 10**-4 and 6.4 10**-4 at the 90\%~C.L. These results allow a 90\% C.L. lower limit of 0.40 (GeV/c**2)**-1 to be set on the tan(beta)/mH+/- ratio, in the framework of type-II two-Higgs-doublet models.