Search for the rare decay K^0_S -> mu+ mu

A search for the decay KS -> mu+ mu- is performed, based on a data sample of 1.0 fb^-1 of pp collisions at \sqrt{s}=7 TeV collected by the LHCb experiment at the Large Hadron Collider. The observed number of candidates is consistent with the background-only hypothesis, yielding an upper limit of...

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Bibliographic Details
Published in:The journal of high energy physics 2013, Vol.1
Main Authors: Aaij, R., Barsuk, S., Callot, O., He, J., Jean-Marie, B., Lefrançois, J., Machefert, F., Martin Sanchez, A., Nicol, M., Robbe, P., Schune, M.-H., Viaud, B., Videau, I., Ben-Haim, E., Benayoun, M., David, P., del Buono, L., Martens, A., Ajaltouni, Ziad Zj, Deschamps, O., Cogneras, E., El Rifai, I., Henrard, Pierre, Hoballah, M., Jahjah-Hussein, Marwa, Lefèvre, R., Li Gioi, L., Monteil, S., Niess, V., Perret, Pascal, Roa Romero, Diego Alejandro, Sobczak, Krzysztof Grzegorz, de Bonis, I., Decamp, D., Ghez, Ph, Hopchev, P., Lees, J.-P., Machikhiliyan, I.V., Minard, M.-N., Pietrzyk, B., t'Jampens, S., Tisserand, V., Tournefier, E., Adrover, C., Aslanides, E., Cogan, J., Legac, R., Leroy, O., Mancinelli, G., Maurice, E., Perrin-Terrin, M., Sapunov, M., Serrano, J., Tsaregorodtsev, A.
Format: Article
Language:English
Subjects:
High Energy Physics - Experiment
Physics
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Summary:A search for the decay KS -> mu+ mu- is performed, based on a data sample of 1.0 fb^-1 of pp collisions at \sqrt{s}=7 TeV collected by the LHCb experiment at the Large Hadron Collider. The observed number of candidates is consistent with the background-only hypothesis, yielding an upper limit of BR(KS -> mu+ mu-) < 11 (9) x 10^-9 at 95 (90)% confidence level. This limit is a factor of thirty below the previous measurement.
ISSN:1126-6708
1029-8479
DOI:10.1007/JHEP01(2013)090