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Observation of Single Top-Quark Production

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  • 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
  • L. S. Ancu
  • T. Andeen
  • M. S. Anzelc
  • M. Aoki
  • Y. Arnoud
  • M. Arov
  • M. Arthaud
  • A. Askew
  • B. Asman
  • 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
  • S. B. Beri
  • I. Bertram
  • G. Borissov
  • H. Fox
  • M. Johnson
  • P. Love
  • P. N. Ratoff
  • A. Sopczak
  • M. R. J. Williams
  • D0 Collaboration
Article number092001
<mark>Journal publication date</mark>28/08/2009
<mark>Journal</mark>Physical review letters
Issue number9
Number of pages7
Pages (from-to)-
Publication StatusPublished
<mark>Original language</mark>English


We report observation of the electroweak production of single top quarks in pp collisions at s=1.96 TeV based on 2.3 fb(-1) of data collected by the D0 detector at the Fermilab Tevatron Collider. Using events containing an isolated electron or muon and missing transverse energy, together with jets originating from the fragmentation of b quarks, we measure a cross section of sigma(pp -> tb+X,tqb+X)=3.94 +/- 0.88 pb. The probability to measure a cross section at this value or higher in the absence of signal is 2.5x10(-7), corresponding to a 5.0 standard deviation significance for the observation.

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© 2009 The American Physical Society