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Observation of hadronic tt¯events with the collider detector at fermilab

  • F. Abe
  • , H. Akimoto
  • , A. Akopian
  • , M. G. Albrow
  • , A. Amadon
  • , S. R. Amendolia
  • , D. Amidei
  • , J. Antos
  • , S. Aota
  • , G. Apollinari
  • , T. Arisawa
  • , T. Asakawa
  • , W. Ashmanskas
  • , M. Atac
  • , P. Azzi-Bacchetta
  • , N. Bacchetta
  • , S. Bagdasarov
  • , M. W. Bailey
  • , P. de Barbaro
  • , V. E. Barnes
  • B. A. Barnett, M. Barone, G. Bauer, T. Baumann, F. Bedeschi, S. Behrends, S. Belforte, G. Bellettini, J. Bellinger, D. Benjamin, J. Bensinger, A. Beretvas, J. P. Berge, J. Berryhill, S. Bertolucci, S. Bettelli, B. Bevensee, A. Bhatti, K. Biery, C. Bigongiari, M. Binkley, D. Bisello, R. E. Blair, C. Blocker, S. Blusk, A. Bodek, W. Bokhari, G. Bolla, Y. Bonushkin, D. Cronin-Hennessy, CDF Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

We observe hadronic W decays in tt¯→W(→ lv)+≥4 jet events using a 109 pb−1data sample of pp¯collisions at s=1.8TeV collected with the Collider Detector at Fermilab. A peak in the dijet invariant mass distribution is obtained that is consistent with W decay and inconsistent with the background prediction by 3.3 σ.From this peak we measure the W mass to be 77.2±4.6(stat+syst)GeV/c2. This result demonstrates the presence of a second W boson in tt¯candidates in the W(→ lv)+≥jet channel.

Original languageEnglish (US)
Pages (from-to)5720-5725
Number of pages6
JournalPhysical review letters
Volume80
Issue number26
DOIs
StatePublished - 1998

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