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Measurement of the t over(t, ̄) production cross section and top quark mass extraction using dilepton events in p over(p, ̄) collisions

  • V. M. Abazov
  • , B. Abbott
  • , M. Abolins
  • , B. S. Acharya
  • , M. Adams
  • , T. Adams
  • , E. Aguilo
  • , M. Ahsan
  • , G. D. Alexeev
  • , G. Alkhazov
  • , A. Alton
  • , G. Alverson
  • , G. A. Alves
  • , M. Anastasoaie
  • , L. S. Ancu
  • , T. Andeen
  • , B. Andrieu
  • , M. S. Anzelc
  • , M. Aoki
  • , Y. Arnoud
  • M. Arov, M. Arthaud, A. Askew, B. Åsman, A. C.S. Assis Jesus, O. Atramentov, C. Avila, J. BackusMayes, F. Badaud, L. Bagby, B. Baldin, D. V. Bandurin, P. Banerjee, S. Banerjee, E. Barberis, A. F. Barfuss, P. Bargassa, P. Baringer, J. Barreto, J. F. Bartlett, U. Bassler, D. Bauer, S. Beale, A. Bean, M. Begalli, M. Begel, C. Belanger-Champagne, L. Bellantoni, A. Bellavance, J. A. Benitez, S. B. Beri, G. Bernardi, R. Bernhard, I. Bertram, M. Besançon, R. Beuselinck, V. A. Bezzubov, P. C. Bhat, V. Bhatnagar, G. Blazey, F. Blekman, S. Blessing, K. Bloom, A. Boehnlein, D. Boline, T. A. Bolton, E. E. Boos, G. Borissov, T. Bose, A. Brandt, R. Brock, G. Brooijmans, A. Bross, D. Brown, X. B. Bu, N. J. Buchanan, D. Buchholz, M. Buehler, V. Buescher, V. Bunichev, S. Burdin, T. H. Burnett, C. P. Buszello, P. Calfayan, B. Calpas, S. Calvet, J. Cammin, M. A. Carrasco-Lizarraga, E. Carrera, W. Carvalho, B. C.K. Casey, H. Castilla-Valdez, S. Chakrabarti, D. Chakraborty, K. M. Chan, A. Chandra, E. 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Résultats de recherche: Contribution à un journalArticleRevue par des pairs

36 Citations (Scopus)

Résumé

We present a measurement of the top quark pair production cross section in p over(p, ̄) collisions at sqrt(s) = 1.96   TeV using approximately 1 fb-1 collected with the DØ detector. We consider decay channels containing two high pT charged leptons where one lepton is identified as an electron or a muon while the other lepton can be an electron, a muon or a hadronically decaying τ lepton. For a mass of the top quark of 170 GeV, the measured cross section is 7.5- 1.0+ 1.0 (stat)- 0.6+ 0.7 (syst)- 0.5+ 0.6 (lumi)   pb. Using ℓτ events only, we measure: σt over(t, ̄) × B (t over(t, ̄) → ℓ τ b over(b, ̄)) = 0.13- 0.08+ 0.09 (stat)- 0.06+ 0.06 (syst)- 0.02+ 0.02 (lumi)   pb. Comparing the measured cross section as a function of the mass of the top quark with a partial next-to-next-to leading order Quantum Chromodynamics theoretical prediction, we extract a mass of the top quark of 171.5- 8.8+ 9.9   GeV, in agreement with direct measurements.

langue originaleAnglais
Pages (de - à)177-185
Nombre de pages9
journalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume679
Numéro de publication3
Les DOIs
étatPublié - 24 août 2009
Modification externeOui

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