Evidence for associated production of a single top quark and W boson in pp collisions at 7 TeV

Evidence for associated production of a single top quark and W boson in pp collisions at 7 TeV

Evidence is presented for the associated production of a single top quark and W boson in pp collisions at sqrt(s) = 7 TeV with the CMS experiment at the LHC. The analyzed data corresponds to an integrated luminosity of 4.9 inverse femtobarns. The measurement is performed using events with two lepton...

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Veröffentlicht in:Physical review letters 2013, Vol.110
Hauptverfasser: Chatrchyan, S., Besancon, M., Choudhury, S., Dejardin, M., Denegri, D., Fabbro, B., Faure, J.L., Ferri, F., Ganjour, S., Givernaud, A., Gras, P., Hamel de Monchenault, G., Jarry, P., Locci, E., Malcles, J., Millischer, L., Nayak, A., Rander, J., Rosowsky, A., Shreyber, I., Titov, M., Baffioni, S., Beaudette, F., Benhabib, L., Bianchini, L., Bluj, M., Broutin, C., Busson, Pierre, Charlot, C., Daci, N., Dahms, T., Dalchenko, M., Dobrzynski, L., Granier de Cassagnac, R., Haguenauer, M., Mine, P., Mironov, C., Naranjo, I.N., Nguyen, M., Ochando, C., Paganini, P., Sabes, D., Salerno, R., Sirois, Y., Veelken, C., Zabi, A., Agram, J.-L., Andrea, J., Bloch, D., Bodin, D., Brom, J.-M., Cardaci, M., Chabert, E.C., Collard, C., Conte, E., Drouhin, F., Ferro, C., Fontaine, J.-C., Gele, D., Goerlach, U., Juillot, P., Le Bihan, A.-C., van Hove, P., Fassi, F., Mercier, D., Beauceron, S., Beaupere, N., Bondu, O., Boudoul, G., Chasserat, J., Chierici, R., Contardo, D., Depasse, P., El Mamouni, H., Fay, J., Gascon, S., Gouzevitch, M., Ille, B., Kurca, T., Lethuillier, M., Mirabito, L., Perries, S., Sgandurra, L., Sordini, V., Tschudi, Y., Verdier, P., Viret, S.
Format: Artikel
Sprache:eng
Schlagworte:
High Energy Physics - Experiment
Physics
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Zusammenfassung:Evidence is presented for the associated production of a single top quark and W boson in pp collisions at sqrt(s) = 7 TeV with the CMS experiment at the LHC. The analyzed data corresponds to an integrated luminosity of 4.9 inverse femtobarns. The measurement is performed using events with two leptons and a jet originated from a b quark. A multivariate analysis based on kinematic properties is utilized to separate the t t-bar background from the signal. The observed signal has a significance of 4.0 sigma and corresponds to a cross section of (16 +5 -4) pb, in agreement with the standard model expectation of (15.6 +/- 0.4 (+ 1.0 -1.2)) pb.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.110.022003