Here’s a dump of the header and first event in the stdhep file.
The electron and positron from pdgid=622 do have a displaced vertex.
====== File Header ===========
total blocks: 848
version: 2.01
title: tm_17mm.stdhep
comment: No comment
date: Sat Mar 28 13:43:27 2015
closing date: Sat Mar 28 13:43:27 2015
expected events: 1000
events: 4593
firstTable: -1
dimTable: 100
nNTuples: 0
nBlocks: 8
block names:
: Standard HEP COMMON block, see STDHEP Product
: Standard HEP COMMON block with multiple interaction, see STDHEP Product
: Stdhep begin run record, see STDHEP Product
: Stdhep end run record, see STDHEP Product
: Standard HEP COMMON block with Les Houches, see STDHEP Product
: Standard HEP COMMON block with Les Houches and multiple interaction
: Les Houches HEPEUP common block
: Les Houches HEPRUP common block
=============================
event has 6 particles
Track: 0, id: 11, vtx: (0, 0, 0, 0), mom: (0, 0, 6.6, 6.6, 0.0005111)
Track: 0, mother1: 0, mother2: 0, daughter1: 3, daughter2: 6, status: 3
Track: 1, id: -623, vtx: (0, 0, 0, 0), mom: (0, 0, 7.56373e-012, 171.24, 171.24)
Track: 1, mother1: 0, mother2: 0, daughter1: 3, daughter2: 6, status: 3
Track: 2, id: 622, vtx: (0, 0, 0, 0), mom: (0.03307, 0.0049935, 6.03357, 6.03736, 0.211)
Track: 2, mother1: 1, mother2: 2, daughter1: 4, daughter2: 5, status: 2
Track: 3, id: -11, vtx: (0.44637, 0.067401, 81.4396, 0), mom: (0.0372964, -0.063853, 5.30674, 5.30725, 0.0005111)
Track: 3, mother1: 3, mother2: 3, daughter1: 0, daughter2: 0, status: 1
Track: 4, id: 11, vtx: (0.44637, 0.067401, 81.4396, 0), mom: (-0.00422642, 0.0688465, 0.726836, 0.730102, 0.0005111)
Track: 4, mother1: 3, mother2: 3, daughter1: 0, daughter2: 0, status: 1
Track: 5, id: 11, vtx: (0, 0, 0, 0), mom: (-0.00857002, 0.0259785, 0.561974, 0.56264, 0.0005111)
Track: 5, mother1: 1, mother2: 2, daughter1: 0, daughter2: 0, status: 1
Here’s the output from slic:
And the start positions are all (0,0,0).
I’ll continue to investigate.
Norman