Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel

A measurement of the production cross-section for top quark pairs (tt¯) in pp collisions at s=7 TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in the single lepton topology by requiring an electron or muon, large missing transverse mome...

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Veröffentlicht in:	Physics letters. B 2012-05, Vol.711 (3-4), p.244-263
Hauptverfasser:	Aad, G., Aderholz, M., Adragna, P., Adye, T., Anders, C.F., Aoun, S., Atoian, G., Bachacou, H., Battaglia, A., Bentvelsen, S., Blumenschein, U., Bocci, A., Boterenbrood, H., Buira-Clark, D., Calkins, R., Casadei, D., Chekanov, S., Chen, S., Cindro, V., De Nooij, L., Delemontex, T., Della Pietra, M., Delsart, P.A., Duflot, L., Errede, D., Gao, Y.S., Geerts, D.A.A., Gemme, C., Geweniger, C., Godlewski, J., Gonzalez Parra, G., Gutierrez, A., Gutierrez, P., Hadley, D.R., Hajduk, Z., Harris, O.M., Hawes, B.M., Hoummada, A., Huston, J., Jackson, B., Jaekel, M.R., Jeanty, L., Jinnouchi, O., Johansen, L.G., Kantserov, V.A., Kaplan, B., Knecht, N.S., Köneke, K., Koenig, S., Koletsou, I., Kostyukhin, V.V., Kroseberg, J., Lamanna, M., Lavrijsen, W., Lipeles, E., Lucotte, A., Mamuzic, J., Manning, P.M., Martin, Ph, Massa, I., Mattravers, C., Mcfayden, J.A., Meier, K., Mikestikova, M., Napier, A., Negri, G., Ninomiya, Y., Norton, P.R., Okuyama, T., Oropeza Barrera, C., Peleganchuk, S.V., Policicchio, A., Popovic, D.S., Potter, C.T., Pylypchenko, Y., Richter-Was, E., Riu, I., Robichaud-Veronneau, A., Rodier, S., Romaniouk, A., Sarangi, T., Sauvage, G., Seiden, A., Seliverstov, D.M., Shimizu, S., Sidoti, A., Silbert, O., Skinnari, L.A., Strom, D.M., Testa, M., Tojo, J., Tua, A., Tudorache, V., Vellidis, C., Vlasov, N., Wagner, W., Wunstorf, R., Yang, Y., Zaets, V.G., Zhu, H.
Format:	Artikel
Sprache:	eng
Schlagworte:	Channels Ciências Físicas Ciências Naturais Cross sections Cross sections (physics) Cross-section Elementary particles Exact sciences and technology High Energy Physics - Experiment High-energy collider experiment Lead (metal) Leptons Mathematical analysis Nuclear physics Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Quarks Science & Technology The physics of elementary particles and fields Top physics
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Zusammenfassung:	A measurement of the production cross-section for top quark pairs (tt¯) in pp collisions at s=7 TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in the single lepton topology by requiring an electron or muon, large missing transverse momentum and at least three jets. With a data sample of 35 pb−1, two different multivariate methods, one of which uses b-quark jet identification while the other does not, use kinematic variables to obtain cross-section measurements of σtt¯=187±11(stat.)−17+18(syst.)±6(lumi.) pb and σtt¯=173±17(stat.)−16+18(syst.)±6(lumi.) pb respectively. The two measurements are in agreement with each other and with QCD calculations. The first measurement has a better a priori sensitivity and constitutes the main result of this Letter.
ISSN:	0370-2693 1873-2445 1873-2445
DOI:	10.1016/j.physletb.2012.03.083