on rcas:               /phenix/data07/hubert/pythia2/batch/...
on the local cluster: /needles/people/hubert/pythia2/batch/...

b,bbar quark events -> B+ or B- meson -> single mu
--------------------------------------------------
pythia ntuple:    proot_20x.root    x = 0-9
pisa output:     ancsvx_20x.root
10M events each


b,bbar quark events -> any D(+-0*sc) meson -> single mu
-------------------------------------------------------
pythia ntuple:    proot_5x.root    x = 0-9
??M events each
some ancsvx_5*.root for *=1,5-9
Note that is an oddbal decay chain, made by mistake.
pid_parent=5, pid_d=400's


c,cbar quark events -> any D(+-0*sc) meson -> single mu
-------------------------------------------------------
pythia ntuples:    proot_xx.root    x = 00-59
pisa output:
 0-10 --
11-19 ancsvx_xx_new.root      PISAEvent.root for 11-19
20-29 ---                     PISAEvent.root for 21-27
30-49 ancsvx_xx_new.root      PISAEvent.root for 30-49
60-62 ---                     PISAEvent_xx.root     also has mut, mid