Dear Djamel,
              the plots look very nice. In principle since
you have pi,k,p and d peaks you are sensitive to weather you
have  a momentum offset or a momentum gain problem. Of course
Ian's test with the reverse field is the first one to do. He is
right that with these data you can in principle get a first
pbar/p.
                Michael
Quoting Djamel Ouerdane <ouerdane@nbi.dk>:
> Hi all,
> 
> I incorporated a method to clean background (track vertices) in the TODW
> 
> pid and the result can be seen here (for positive particles):
> 
> http://www.nbi.dk/~ouerdane/cal/Tofw.html
> 
> in the sublinks positive pid and mass2.
> 
> Djam
> 
> 
> -- 
> Djamel Ouerdane ------------------------------------------o
> |  Niels Bohr Intstitute     |  Home:                     |
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> |                  ouerdane@nbi.dk                        |
> o---------------------------------------------------------o
> 
Michael Murray, Cyclotron TAMU, 979 845 1411 x 273, Fax 1899
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