1998/01/27 by D0 Collaboration, B. Abbott, M. Abolins +98 · 7 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevd.58.052001
published as Phys.Rev.D58:052001,1998 · 43 pages, 53 figures, 33 tables. RevTeX. Submitted to Phys. Rev. D
arxiv created 1998/01/27 · openalex publication_date 1998/07/23 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We determine the top quark mass mt using tt pairs produced in the D\O detector by √(s)=1.8TeV pp collisions in a 125pb^\ensuremath-1 exposure at the Fermilab Tevatron. We make a two constraint fit to mt in tt\ensuremath→bW+bW^\ensuremath- final states with one W boson decaying to qq and the other to e\ensuremathν or \ensuremathμ\ensuremathν. Likelihood fits to the data yield mt(l+jets)=173.3\ifmmode±\else\textpm\fi5.6(stat)\ifmmode±\else\textpm\fi5.5(syst) GeV/c2. When this result is combined with an analysis of events in which both W bosons decay into leptons, we obtain mt=172.1\ifmmode±\else\textpm\fi5.2(stat)\ifmmode±\else\textpm\fi4.9(syst) GeV/c2. An alternate analysis, using three constraint fits to fixed top quark masses, gives mt(l+jets)=176.0\ifmmode±\else\textpm\fi7.9(stat)\ifmmode±\else\textpm\fi4.8(syst) GeV/c2, consistent with the above result. Studies of kinematic distributions of the top quark candidates are also presented. 14.65.Ha, 13.85.Ni, 13.85.Qk