We present a measurement of the top quark mass from events produced in
p-pbar collisions at a center-of-mass energy of 1.96 TeV, using the
Collider Detector at Fermilab. We identify t-tbar candidates where both W
bosons from the top quarks decay into leptons (e-nu, mu-nu, tau-nu) from a
data sample of 340 pb^{-1}. The top quark mass is reconstructed in
each event separately by the method which draw upon simulated
distribution of t-tbar longitudinal momentum in order to extract
probability distribution for the top quark mass. Representative
distributions, or templates, are constructed from simulated samples of
signal and background events, and parametrized to form continuous
probability density functions. A likelihood fit incorporating these
parametrized templates is then performed on the data sample masses in
order to derive a final top quark mass. 
Measured top quark mass is Mtop = 169.5+ 7.7 - 7.2(stat.) +- 4.0(syst.) GeV/c^2.


Posted to:
  /cdf/www/pub/thesis/cdf8902_LysakThesis_TopMass_1.pdf
      http://www-cdf.fnal.gov/thesis/cdf8902_LysakThesis_TopMass_1.pdf
  /cdf/www/pub/thesis/cdf8902_LysakThesis_TopMass_2.ps
      http://www-cdf.fnal.gov/thesis/cdf8902_LysakThesis_TopMass_2.ps

Posted by lysak