Acosta, D;
              
      
            
                Affolder, T;
              
      
            
                Akimoto, T;
              
      
            
                Albrow, MG;
              
      
            
                Ambrose, D;
              
      
            
                Amerio, S;
              
      
            
                Amidei, D;
              
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
          
      
            
            
            ... CDF Collaboration, .; + view all
            
          
      
        
        
        
    
  
(2004)
  Measurement of the t(t)over-bar production cross section in p(p)over-bar collisions at root s=1.96 TeV using dilepton events.
Physical Review Letters
, 93
      
    
    
    
    , Article 142001.     10.1103/PhysRevLett.93.142001.
  
  
       
    
  
| ![[thumbnail of 131798.pdf]](https://discovery.ucl.ac.uk/style/images/fileicons/application_pdf.png) Preview | PDF 131798.pdf Available under License : See the attached licence file. Download (218kB) | 
Abstract
We report a measurement of the t (t) over bar production cross section using dilepton events with jets and missing transverse energy in p (p) over bar collisions at a center-of-mass energy of 1.96 TeV. Using a 197+/-12 pb(-1) data sample recorded by the upgraded Collider Detector at Fermilab, we use two complementary techniques to select candidate events. We compare the number of observed events and selected kinematical distributions with the predictions of the standard model and find good agreement. The combined result of the two techniques yields a t (t) over bar production cross section of 7.0(-2.1)(+2.4)(stat)(-1.1)(+1.6)(syst)+/-0.4(lum) pb.
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