VM Abazov

Publications (3)0 Total impact

• Article: Combination of CDF and D0 results on the W boson mass and width

  VM Abazov, B Abbott, A. Abdesselam, M Abolins, V. Abramov, BS Acharya, D Acosta, DL Adams, M Adams, T. Affolder, [......], GD Alexeev, A Alton, GA Alves, P Amaral, D Ambrose, SR Amendolia, D Amidei, K. Anikeev, J Antos, Apolli
• Article: A precision measurement of the mass of the top quark

  VM Abazov, B Abbott, A. Abdesselam, M Abolins, V. Abramov, Bobby S. Acharya, DL Adams, M Adams, SN Ahmed, GD Alexeev, [......], D Karmanov, D. Karmgard, R Kehoe, S Kesisoglou, A Khanov, A Kharchilava, B Klima, JM Kohli, S. Baffioni, AV Kostritskiy
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  ABSTRACT: The standard model of particle physics contains parameters such as particle masses - whose origins are still unknown and which cannot be predicted, but whose values are constrained through their interactions. In particular, the masses of the top quark (M-t) and W boson (M-W)(1) constrain the mass of the long-hypothesized, but thus far not observed, Higgs boson. A precise measurement of Mt can therefore indicate where to look for the Higgs, and indeed whether the hypothesis of a standard model Higgs is consistent with experimental data. As top quarks are produced in pairs and decay in only about 10(-24) s into various final states, reconstructing their masses from their decay products is very challenging. Here we report a technique that extracts more information from each top-quark event and yields a greatly improved precision (of +/- 5.3 GeV/c(2)) when compared to previous measurements(2). When our new result is combined with our published measurement in a complementary decay mode(3) and with the only other measurements available(2), the new world average for M-t becomes(4) 178.0 +/- 4.3 GeV/c(2). As a result, the most likely Higgs mass increases from the experimentally excluded(5) value(6) of 96 to 117GeV/c(2), which is beyond current experimental sensitivity. The upper limit on the Higgs mass at the 95% confidence level is raised from 219 to 251 GeV/c(2).
  Nature.
• Article: Combination of CDF and D0 results on the W boson mass and width

  CDF Collaboration, VM Abazov, B Abbott, A. Abdesselam, M Abolins, V. Abramov, BS Acharya, D Acosta, DL Adams, M Adams, [......], X Zhang, B Zhou, Z Zhou, M Zielinski, D Zieminska, A Zieminski, S Zucchelli, V Zutshi, EG Zverev, A Zylberstejn