A measurement of the $p\bar{p} \rightarrow W$ cross section  at $\sqrt{s} =$~1.96~TeV using forward electrons at CDF

Abstract: We present a measurement of the $W$ boson production 
cross section using electrons identified in the rapidity region 
$1.2<|\eta|<2.8$ in 223 pb$^{-1}$ of CDF~II data collected from 
2002 to 2004.  $W \rightarrow e\nu$ events are selected using 
the combined information from the forward calorimeter and 
silicon tracking detectors.  Taking the ratio of this cross 
section toan earlier one obtained in the central detector 
region ($1.2<|\eta_e|<2.8$), we demonstrate the measurements' 
ability to constrain parton distribution functions.