Alpgen Production 2008

• Alpgen ttbar + N partons, N = 0,1,2,3,4
• ptjmin = 30, 40, 50 GeV
• Library: 2Qwork
• Production of grid2 files.
• Maria's rule of thumb: 5+N iterations, where N is the number of light (udsg) partons.
• ~ 43000 events per minute.

Template file:

1          ! generation mode
ttbar4j_40 ! string labeling the output files
0          ! start with: 0=new grid, 1=previous warmup grid, 2=previous generation grid
4000000  5 ! N(events)/iteration and N(iter's) for initial grid optimiz
50000000   ! number evts to generate
*** The above 5 lines provide mandatory inputs for all processes
*** (Comment lines are introduced by the three asteriscs)
*** The lines below modify existing defaults for the hard process under study
*** For a complete list of accessible parameters and their values,
*** input 'print 1' (to display on the screen) or 'print 2' to write to file
njets 4
ebeam 5000
ih2 1
ickkw 1
ptjmin 40
etajmax 5
drjmin 0.7
mt 175
ihvy 6
itdecmode 7

• Tried only 5 iterations for ttbar + 4 jets, trying now with 9 iterations and seeing if it makes a difference.

-- ThiagoTomei - 15 Dec 2008

• Using the SPRACE cluster to generate 0,1,2,3 jets.
• 4 jets still running in access.

Script to submit Alpgen generation jobs:

• sprace_ALPGEN_submit.py.txt

-- ThiagoTomei - 16 Dec 2008

-- ThiagoTomei - 17 Dec 2008

Grids done. Running showering and matching now. Efficiencies seem to come down a little bit too low.

Scripts for showering and matching:

• sprace_CMSSW_alpgmatch.py.txt
• Alpgen_cfg.py.txt

-- ThiagoTomei - 17 Dec 2008