Measurement of the t(t)over-bar production cross section using dilepton events in p(p)over-bar collisions

We present a measurement of the a production cross section sigma((u) over bar) in p (p) over bar collisions at root s = 1.96 TeV using 5.4 fb(-1) of integrated luminosity collected with the D0 detector. We consider final states with at least two jets and two leptons (ee, e mu, mu mu), and events wit...

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Veröffentlicht in:	Physics letters. B 2011-10, Vol.704 (5), p.403
Hauptverfasser:	Ancu, L. S., Askew, A., Bandurin, D. V., Banerjee, S., Begel, M., Bertram, I., Bhat, P. C., Blessing, S., Boehnlein, A., Brandt, A., Brandt, O., Chan, K. M., Cho, D. K., Cho, S. W., Cihangir, S., Cooke, M., Croc, A., Cutts, D., Davies, G., DeVaughan, K., Dominguez, A., Dorland, T., Duggan, D., Dutt, S., Eads, M., Fiedler, F., Gavrilov, V., Grannis, P. D., Greenlee, H., Gregores, E. M., Grenier, G., Gruenendahl, S., Guillemin, T., Guo, F., Gutierrez, P., Hays, J., Hebbeker, T., Herner, K., Hesketh, G., Hirosky, R., Hoang, T., Jaffre, M., Jesik, R., Johnson, M., Kajfasz, E., Katsanos, I., Kharzheev, Y. N., Kozelov, A. V., Kumar, A., Lebrun, P., Lee, H. S., Lee, S. W., Lipton, R., Liu, Y., Liu, Z., Lokajicek, M., Luna-Garcia, R., Maciel, A. K. A., Madar, R., Malyshev, V. L., Martinez-Ortega, J., McCarthy, R., Melnitchouk, A., Nagy, E., Narain, M., Obrant, G., Orduna, J., Otero y Garzon, G. J., Parihar, V., Park, S. K., Petrillo, G., Pleier, M. -A, Podstavkov, V. M., Prokopenko, N., Protopopescu, S., Quinn, B., Rijssenbeek, M., Rominsky, M., Sanghi, B., Scanlon, T., Schwanenberger, C., Shabalina, E., Shary, V., Shchukin, A. A., Smirnov, D., Snow, G. R., Snyder, S., Soeldner-Rembold, S., Stolin, V., Suter, L., Takahashi, M., Taylor, W., Titov, M., Tokmenin, V. V., Varelas, N., Warchol, J., Welty-Rieger, L., Williams, M. R. J., Xu, C., Yu, J.
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Sprache:	eng
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Zusammenfassung:	We present a measurement of the a production cross section sigma((u) over bar) in p (p) over bar collisions at root s = 1.96 TeV using 5.4 fb(-1) of integrated luminosity collected with the D0 detector. We consider final states with at least two jets and two leptons (ee, e mu, mu mu), and events with one jet for the e mu final state as well. The measured cross section is sigma((u) over bar) = 7.36(-0.79)(+0.90)(stat + syst) pb. This result combined with the cross section measurement in the lepton + jets final state yields sigma((u) over bar) = 7.56(-0.56)(+0.63)(stat + syst) pb, which agrees with the standard model expectation. The relative precision of 8% of this measurement is comparable to the precision of the latest theoretical calculations. (C) 2011 Elsevier B.V. All rights reserved.
ISSN:	0370-2693 1873-2445
DOI:	10.1016/j.physletb.2011.09.046