MC of CalDet

1
MC of CalDet
G.Choudalakis,P.Stamoulis,G.Tzanakos,M.Zois
University of Athens

• GOAL Interaction Discrimination
• In order to discriminate neutrino interaction
  types (with any method), we have to get a
  feeling of how the different interactions and
  particles look like in our detectors.
• Especially for ANN techniques,we must have good
  MC representations of particle interactions in
  the detectors to use in training.
• We tried to reproduce the CalDet data with the MC
  provided
• We followed the instructions and code found at
• http//www.hep.utexas.edu/kordosky/mc.html
• (Thanks to Mike, Tricia and Robert for continuous
  help and interaction).

• Working on flxi03 machine GCC 3.2, ROOT
  3.05.07
• Using stable versions of gnumi and analysis
  software packages(The following lines appear on
  .cshrc) source/afs/fnal.gov/files/code/e875/
  sim/labyrinth_sandbox/setup_labyrinth.csh
  source/afs/fnal.gov/files/code/e875/general/minoss
  oft/setup/setup_minossoft_FNALU.csh -r R1.2
• constructed 200 events of each single particle
  beamelectrons,muons,pions,protons
• Not getting any error messages when building the
  software, running gnumi (as modified by Mike),
  rerooting or looning the reroot files, BUT

2
a.Minor disturbance all snarls have snarl no
4.9x107 (more likely,they are never
filled?) b.More importantThe electrons,muons,pion
s and protons(?) do not look as expected...see
below how do we know what we are
expecting--gtCalDet Data with cerenkov and TOF
information
Pictureselectrons,muons,pions and protons
2.4GeV/c,MC.Separate x and y views. Color coded
according to pulseheight
3
First ReactionWhat are we doing wrong? Help
needed from the experts... All logfiles and
details about the procedures are available on
request
OR Is something wrong with the MC? Conjecture
Something is hard-coded into the MC that creates
particles with equal probabilities anywhere
inside the detector...This obviously must be
turned off for CalDet AGAIN, Help needed from
the experts...