Showers in Master: Error in CS_SHOWER::Sudakov.C and negative masses^2 from DIRE
When running the attached run card master.dat, master has a funny behaviour:
- CS Shower crashes in Sudakov.C in the method Mass(Flavour) of the ME_Generator_Base - this is because although the pointer to a spectator exists, it is not filled. I have not quite understood why this is the case.
- In AHADIC::Singlet_Checker I test if the partons entering hadronization are on their mass shell. there are a number of gluons with negative masses squared, usually of the order of m^2 = 0.001 or so. I have observed this with DIRE but not with CSS - maybe because the latter crashed too early.