We report on the first measurement of the rapidity distribution,
$d\sigma/dy$, over the full kinematic range for $e^+e^-$ pairs in 
the $Z$ boson region of $66<M_{ee}<116$~GeV$/c^2$.
%and at higher mass  $M_{ee}>116$~GeV$/c^2$. 
The data sample consists of
108~pb$^{-1}$ of $p\bar{p}$ collisions at $\sqrt{s}=1.8$~TeV
taken by the Collider Detector at Fermilab during 1992--1995.  
The total cross section in the $Z$-boson region is measured to be 
$252 \pm 11$ pb.
The total cross section and $d\sigma/dy$ are compared with 
Quantum Chromodynamics calculations in leading order,
next-to-leading-order (NLO), next-to-next-leading-order, 
and NLO with gluon resummation.


Posted to /cdf/pub/thesis/cdf5405_liu_thesis.ps
    http://www-cdf.fnal.gov/thesis/cdf5405_liu_thesis.ps

Posted by liujb@cdfsga