A measurement of the inclusive b→ sγ branching ratio

A measurement of the inclusive b→ sγ branching ratio

The flavour changing neutral current decay b→ sγ has been detected in hadronic Z decays collected by ALEPH at LEP. The signal is isolated in lifetime-tagged b b ̄ events by the presence of a hard photon associated with a system of high momentum and high rapidity hadrons. The background processes are...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Physics letters. B 1998-06, Vol.429 (1), p.169-187
Hauptverfasser: Boix, G., Casado, M.P., Garrido, Ll, Graugès, E., Merino, G., Mir, Ll.M., Riu, I., Sanchez, F., Gelao, G., Maggi, M., Tricomi, A., Huang, X., Zhang, J., Zhang, L., Cattaneo, M., Hansen, J.B., Jost, B., Mato, P., Pusztaszeri, J.-F., Rolandi, L., Rousseau, D., Schlatter, D., Schneider, O., Tomalin, I.R., Chazelle, G., Henrard, P., Monteil, S., Pallin, D., Podlyski, F., Rosnet, P., Wäänänen, A., Siotis, I., Valassi, A., Focardi, E., Parrini, G., Zachariadou, K., Bencivenni, G., Mannocchi, G., Murtas, G.P., Halley, A.W., Lynch, J.G., Thomson, E., Dhamotharan, S., Hanke, P., Tittel, K., Beuselinck, R., Binnie, D.M., Cameron, W., Girone, M., Sedgbeer, J.K., Kneringer, E., Buck, P.G., Colrain, P., Hughes, G., Sloan, T., Giehl, I., Kleinknecht, K., Renk, B., Sander, H.-G., van Gemmeren, P., Zeitnitz, C., Aubert, J.J., Benchouk, C., Carr, J., Leroy, O., Talby, M., Seywerd, H., Cordier, A., Davier, M., Duflot, L., Tournefier, E., Videau, I., Zerwas, D., Boccali, T., Ferrante, I., Giassi, A., Ligabue, F., Lusiani, A., Messineo, A., Sanguinetti, G., Tenchini, R., Vannini, C., Blair, G.A., Green, M.G., Botterill, D.R., Edgecock, T.R., Lançon, E., Lemaire, M.-C., Schwindling, J., Vallage, B., Black, S.N., McNeil, M.A., Combley, F., Smolik, L., Stephan, F., Rothberg, J., Wasserbaech, S., Armstrong, S.R., Ferguson, D.P.S., Nachtman, J.M.
Format: Artikel
Sprache:eng
Schlagworte:
High Energy Physics - Experiment
Physics
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The flavour changing neutral current decay b→ sγ has been detected in hadronic Z decays collected by ALEPH at LEP. The signal is isolated in lifetime-tagged b b ̄ events by the presence of a hard photon associated with a system of high momentum and high rapidity hadrons. The background processes are normalised from the data themselves. The inclusive branching ratio is measured to be (3.11±0.80 stat ±0.72 syst )×10 −4, consistent with the Standard Model expectation via penguin processes.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(98)00404-3