# pT integrated density distribution dN/dxF
# as a function of x_F for neutrons 
# in p+p interactions at 158 GeV beam from NA49.
# Errors are always given in percent.
# xF  dN/dxF  error
 0.1  0.481   20.8
 0.2  0.407   14.7
 0.3  0.378   13.2
 0.4  0.325   11.5
 0.5  0.325   12.3
 0.6  0.293   10.2
 0.75 0.286   10.5
 0.9  0.215   27.9