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%	13 Jul 05	PKS	Original version
%	16 Jul 05	PKS	Incorporated Un-ki's version with some changes.
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\title{Improved Top Quark Mass Measurement in the 
Lepton + Jets Topology at CDF II}
%Lepton + Jets Channel at CDF II \\ \vspace*{1.0cm}}
\input{July_2005_Authors_TMT2D}
%\author{The CDF Collaboration}
%\affiliation{URL http://www-cdf.fnal.gov}
\date{\today}

\begin{abstract}
We report two measurements of the top quark mass \mtop\ using the \cdfii 
detector at the Fermilab Tevatron 
in a $\invpb{318}$ data sample observed in the lepton + jets
final state. 
One method uses an event-based likelihood technique
resulting in
$\mtop=\gevcc{\measAStatSyst{173.2}{2.6}{2.4}{3.2}}$\
or $\gevcc{\measAErr{173.2}{4.1}{4.0}}$. 
The second method reconstructs a top quark mass in
each event using the measured invariant mass of the hadronically
decaying $W$ boson to constrain the jet energy scale to obtain
a value for \mtop of
$\gevcc{\measAStatSyst{173.5}{3.7}{3.6}{1.3}}$\ or
$\gevcc{\measAErr{173.5}{3.9}{3.8}}$.  
The latter is the most precise single measurement of this important 
physical parameter.
\end{abstract}

% activate the following line for publication
\pacs{14.65.Ha, 12.15.Ff}

\maketitle
