Simon Sabik

Measurement of the Top Quark Mass in the Dilepton Channel using the Neutrino 
Weighting Algorithm at CDF II

We measure the top quark mass using approximately 359 pb$^{-1}$ of data\ from 
$p\bar{p}$ collisions at $\sqrt{s}$ = 1.96 GeV at CDF Run II. We select $t\bar{t}$ 
candidates that are consistent with two $W$ bosons decaying to a charged lepton and 
a neutrino following $t \bar{t} \rightarrow W^+ W^- b \bar{b} \rightarrow l^+ l^- 
\nu \bar{\nu} b \bar{b}$. Only one of the two charged leptons is required to be 
identified as an electron or a muon candidate, while the other is simply a well 
measured track. We use a neutrino weighting algorithm which weighs each possibility 
of neutrino direction to reconstruct a top quark mass in each event. We compare the 
resulting distribution to Monte Carlo templates to obtain a top quark mass of 
$170.8^{+ 6.9} _{- 6.5} \,(stat)\, \pm\, 4.6\, (syst)$  GeV$/$c$^2$.

Posted to /cdf/pub/thesis/cdf8692_dilepton_nwa.pdf
    http://www-cdf.fnal.gov/thesis/cdf8692_dilepton_nwa.pdf

Posted by danielw