Measurement of the $t\bar{t}$ Production Cross Section in $p\bar{p}$ Collisions at $\sqrt{s}$=1.96 TeV in Dilepton Final States

• Published in: Physics letters. B 2005, Vol.626, p.55-64
• Main Authors: Abazov, V.M., Abbott, B., Abolins, M., Acharya, B.S., Adams, M., Adams, T., Agelou, M., Agram, J.L., Ahn, S.H., Ahsan, M., Alexeev, G.D., Alkhazov, G., Alton, A., Alverson, G., Alves, G.A., Anastasoaie, M., Andeen, T., Anderson, S., Andrieu, B., Arnoud, Y., Askew, A., Åsman, B., Assis Jesus, A.C.S., Atramentov, O., Autermann, C., Avila, C., Badaud, F., Baden, A., Baldin, B., Balm, P.W., Banerjee, S., Barberis, E., Bargassa, P., Baringer, P., Barnes, C., Barreto, J., Bartlett, J.F., Bassler, U., Bauer, D., Bean, A., Beauceron, S., Begel, M., Bellavance, A., Beri, S.B., Bernardi, G., Bernhard, R., Bertram, I., Besançon, M., Beuselinck, R., Bezzubov, V.A., Bhat, P.C., Bhatnagar, V., Binder, M., Biscarat, C., Black, K.M., Blackler, I., Blazey, G., Blekman, F., Blessing, S., Bloch, D., Blumenschein, U., Boehnlein, A., Boeriu, O., Bolton, T.A., Borcherding, F., Borissov, G., Bos, K., Bose, T., Brandt, A., Brock, R., Brooijmans, G., Bross, A., Buchanan, N.J., Buchholz, D., Buehler, M., Buescher, V., Burdin, S., Burnett, T.H., Busato, Emmanuel, Buszello, C.P., Butler, J.M., Bystricky, J., Caron, S., Carvalho, W., Casey, B.C.K., Cason, N.M., Castilla-Valdez, H., Chakrabarti, S., Chakraborty, D., Chan, K.M., Chandra, A., Chapin, D., Charles, F., Cheu, E., Chevalier, L., Cho, D.K., Choi, S. K., Choudhary, B., Christiansen, T., Christofek, L.
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 0370-2693
• DOI: 10.1016/j.physletb.2005.08.105

We present a measurement of the top quark pair $(t\bar{t})$ production cross section in $p\bar{p}$ collisions at a center-of-mass energy of 1.96 TeV using 230 pb$^{-1}$ of data collected by the DO detector at the Fermilab Tevatron Collider. We select events in the dilepton final states $e^+e^-$, $e\mu$ and $\mu\mu$ based on kinematical properties consistent with $t\bar{t}$ events. For a top quark mass of 175 GeV, we measure a top pair production cross section $\sigma_{ t\bar{t}} = 8.6^{+3.2}_{-2.7} (stat) \pm$ 1.1 (syst) $\pm$ 0.6 (lumi) pb, in good agreement with the standard model prediction.