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:
--
ThiagoTomei - 16 Dec 2008
Sample |
Events / cycle |
Cycles |
Asked events |
WGT events |
WGT Xsec (pb) |
Error (pb) |
UNW events |
UNW Xsec (pb) |
Error (pb) |
Unweighting efficiency |
Matched events |
Matching Xsec (pb) |
Error (pb) |
Matched efficiency |
ttbar0j_30GeV |
4000000 |
5 |
50000000 |
6462816 |
2.02E+03 |
1.06E+01 |
1136665 |
1.90E+02 |
9.47E-02 |
2.27E-002 |
702390 |
1.18E+02 |
0.618 |
ttbar0j_40GeV |
4000000 |
5 |
50000000 |
6462816 |
2.02E+03 |
1.06E+01 |
1136665 |
1.90E+02 |
9.47E-02 |
2.27E-002 |
795122 |
1.33E+02 |
0.700 |
ttbar0j_50GeV |
4000000 |
5 |
50000000 |
6462816 |
2.02E+03 |
1.06E+01 |
1136665 |
1.90E+02 |
9.47E-02 |
2.27E-002 |
860824 |
1.44E+02 |
0.757 |
ttbar1j_30GeV |
4000000 |
6 |
50000000 |
2120429 |
1.53E+03 |
9.33E+00 |
424774 |
1.64E+02 |
1.21E-01 |
8.50E-003 |
159965 |
6.18E+01 |
0.377 |
ttbar1j_40GeV |
4000000 |
6 |
50000000 |
2350711 |
1.17E+03 |
9.61E+00 |
453316 |
1.21E+02 |
8.66E-02 |
9.07E-003 |
194990 |
5.21E+01 |
0.430 |
ttbar1j_50GeV |
4000000 |
6 |
50000000 |
2585228 |
9.08E+02 |
9.70E+00 |
506646 |
9.37E+01 |
6.56E-02 |
1.01E-002 |
236252 |
4.37E+01 |
0.466 |
ttbar2j_30GeV |
4000000 |
7 |
50000000 |
190817 |
7.52E+02 |
7.57E+00 |
35558 |
8.73E+01 |
2.03E-01 |
7.11E-004 |
8410 |
2.06E+01 |
0.237 |
ttbar2j_40GeV |
4000000 |
7 |
50000000 |
237619 |
4.35E+02 |
7.89E+00 |
46028 |
4.94E+01 |
9.63E-02 |
9.21E-004 |
12701 |
1.36E+01 |
0.276 |
ttbar2j_50GeV |
4000000 |
7 |
50000000 |
298591 |
2.75E+02 |
8.07E+00 |
59939 |
3.07E+01 |
5.29E-02 |
1.20E-003 |
18102 |
9.27E+00 |
0.302 |
ttbar3j_30GeV |
4000000 |
8 |
50000000 |
262729 |
4.15E+02 |
8.65E+00 |
39244 |
3.49E+01 |
6.64E-02 |
7.85E-004 |
5835 |
5.19E+00 |
0.149 |
ttbar3j_40GeV |
4000000 |
8 |
50000000 |
376197 |
1.88E+02 |
9.15E+00 |
48051 |
1.54E+01 |
2.58E-02 |
9.61E-004 |
8515 |
2.74E+00 |
0.177 |
ttbar3j_50GeV |
4000000 |
8 |
50000000 |
339983 |
1.00E+02 |
9.82E+00 |
56262 |
7.87E+00 |
1.26E-02 |
1.13E-003 |
11006 |
1.54E+00 |
0.196 |
ttbar4j_30GeV |
4000000 |
9 |
50000000 |
208188 |
2.02E+02 |
1.03E+01 |
20263 |
1.15E+01 |
2.53E-02 |
4.05E-004 |
2760 |
1.56E+00 |
0.136 |
ttbar4j_40GeV |
4000000 |
9 |
50000000 |
155193 |
7.33E+01 |
1.13E+01 |
25736 |
4.04E+00 |
8.59E-03 |
5.15E-004 |
3854 |
6.05E-01 |
0.150 |
ttbar4j_50GeV |
4000000 |
9 |
50000000 |
180885 |
3.09E+01 |
1.14E+01 |
30121 |
1.71E+00 |
3.56E-03 |
6.02E-004 |
4854 |
2.75E-01 |
0.161 |
--
ThiagoTomei - 17 Dec 2008
Grids done. Running showering and matching now. Efficiencies seem to come down a little bit too low.
The matching is done with:
- ETCLUS = 1.2*ptjmin, i.e., for ptjmin = (30,40,50) GeV we have ETCLUS = (36,48,60) GeV, as per the ALPGEN defaults.
- DR = 0.7 (fixed).
- ETACLUS = 5.0 (fixed).
Scripts for showering and matching:
--
ThiagoTomei - 17 Dec 2008
All finished. The
AlpgenProduction2008_ttbarjets.tar.gz tarball contains a directory for each sample, and in each directory we find the
.input
file, used to generate the grids, and the
.grid2
file.
--
ThiagoTomei - 18 Dec 2008
In the table below you can find the grids for ttbar, W and Z - W and Z were done by Maurizio.