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Re: HepMC [message #1581 is a reply to message #1570] Wed, 06 April 2005 15:58 Go to previous message
Kilian Schwarz is currently offline  Kilian Schwarz
Messages: 91
Registered: June 2004
Location: GSI, Darmstadt
continuous participant
From: lxg0503.gsi.de
Dear Oleg,

HepMC has been installed for gcc323 at GSI at the location
/usr/local/pub/debian3.0/gcc323-00/sim/HepMC_Version1.25
with examples at
/usr/local/pub/debian3.0/gcc323-00/sim/HepMC_Version1.25/examples

See
http://www.gsi.de/informationen/wti/dvee/software/simulations_sw.html

a description of the generated ASCII files can be found at
http://mdobbs.home.cern.ch/mdobbs/HepMC/html_reference/IO__Ascii_8cxx-so urce.html

it stores
ASCII-File output-extract
============================================
HepMC::IO_Ascii-START_EVENT_LISTING
E 0 -1.0000000000000000e+00 -1.0000000000000000e+00 -1.0000000000000000e+00 0 0 164 0
0
V -1 0 0 0 0 0 1 2 0
P 1 2212 0 0 6.9999999371178146e+03 7.0000000000000000e+03 3 0 0 -1 0
P 3 1 1.8207711891212544e-01 1.8064803338823676e-01 1.0686638074933117e+02
1.0686668854348508e+02 3 0 0 -3 0
...
============================================
According to my understanding, the
(rough) explanation is:
when
'E' = EVENT it stores:
event_number,
event_scale [energy],
alphaQCD,
alphaQED,
signal_process_id,
signal_process_vertex,
signal_process_vertex->barcode,
vertices_size,
weights
when
'V' = VERTICES it stores
vertex->barcode
vertex->id
position(x)
position(y)
position(z)
time
particles_out_size
weights
when
'P' = PARTICLE it stores
particle->barcode
pdg_id
momentum.px
momentum.py
momentum.pz
momentum.e
status
polarization.theta
polarization.phi
end_vertex

Cheers,

Kilian


 
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