Exceptions

Some parameters used for fitting differ from those stored in standard ntuples. For example, we use PDFs in $R^3$ whilst the fitted radius R is stored in the ntuple. Another example is energy drift. The code allows for these two conversions to be made through the routine mxf_param_spec.for. For each parameter an exception flag can be set in the bank MXFD. If the flag is set to the value 1 the RSP energy drift formula is applied, if set to 2 a conversion is made from R to $R^3$ using a normalising fiducial volume of 600cm as set in the file mxf_com.inc. If the flag is set to zero the parameter remains unchanged.