The Truth particle selection had a generic 3 TeV selection, which was somehow
inconsistent with the 1 GeV offline cut, so this has been reduced to 1 GeV
for the trith also.

Similarly, the ID Trigger minbias has a limit of ~400 MeV, and the truth selection
was reduced to this, but the offline selection was still set to 1 GeV, so this
reduces the minbias offline selection to 400 MeV tracking also