First observation of the decay

• Published in: The journal of high energy physics Vol. 2013; no. 9; pp. 1 - 14
• Main Authors: Affolder, A., Ali, S., Anderlini, L., Artamonov, A., Artuso, M., Baldini, W., Bauer, Th, Blusk, S., Brook, N. H., Buytaert, J., Calvi, M., Gomez, M. Calvo, Carboni, G., Garcia, L. Castillo, Charpentier, Ph, Coquereau, S., Davis, A., De Bonis, I., De Miranda, J. M., Del Buono, L., Dzyuba, A., van Eijk, D., Eklund, L., Falabella, A., Färber, C., Farinelli, C., Farry, S., Fiore, M., Francisco, O., Galli, D., Gao, Y., Ghez, Ph, Gomes, A., Diaz, R. Graciani, Greening, E., Hopchev, P., Huse, T., Hynds, D., Iakovenko, V., Johnson, D., Koppenburg, P., Krocker, G., Krokovny, P., Kucharczyk, M., Lambert, D., Latham, T., Lesiak, T., Liles, M., Lu, H., Luisier, J., McCarthy, J., McNulty, R., Milanes, D. A., Mous, I., Needham, M., Nguyen, A. D., Nikitin, N., Ogilvy, S., Okhrimenko, O., Oldeman, R., Goicochea, J. M. Otalora, Palano, A., Pellegrino, A., Penso, G., Perazzini, S., Phan, A., Playfer, S., Casasus, M. Plo, Pritchard, A., Pugatch, V., Punzi, G., Reid, M. M., Vidal, A. Romero, Sail, P., Schindler, H., Sciascia, B., Sciubba, A., Sepp, I., Serra, N., Serrano, J., Smith, M., Souza, D., Stahl, S., Szczekowski, M., Szczypka, P., Teubert, F., Thomas, E., van Tilburg, J., Topp-Joergensen, S., Tran, M. T., Valenti, G., Velthuis, J. J., Vollhardt, A., Vorobyev, A., Wandernoth, S., Wiedner, D., Wiggers, L., Wishahi, J., Yuan, X., Zhang, W. C.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 13.09.2013
• Subjects: Classical and Quantum Gravitation; Collisions; Decomposition; Elementary Particles; Energy use; Large Hadron Collider; Luminosity; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Relativity Theory; Samples; Standard deviation; String Theory; Branching fraction; Hadron-Hadron Scattering; B physics
• ISSN: 1029-8479
• DOI: 10.1007/JHEP09(2013)075

A bstract The decay is observed for the first time using a data sample, corresponding to an integrated luminosity of 1.0 fb −1 , collected by the LHCb experiment in pp collisions at a centre-of-mass energy of 7 TeV. A yield of 46 ± 12 events is reported, with a significance of 5.0 standard deviations. The ratio of the branching fraction of to that of is measured to be 0.069 ± 0.019 ± 0.005, where the first uncertainty is statistical and the second is systematic.