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

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.

ttbar - Xsec vs number of jets - exclusive:

ttbar - Xsec vs number of jets - inclusive:

-- ThiagoTomei - 19 Dec 2008

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
gz	AlpgenProduction2008_Wjets.tar.gz	r2 r1	manage	82.0 K	2008-12-22 - 02:23	ThiagoTomei	Grids for W production.
gz	AlpgenProduction2008_ttbarjets.tar.gz	r2 r1	manage	47.3 K	2008-12-22 - 02:24	ThiagoTomei	Grids for ttbar production.
png	ttbar_exclusive.png	r1	manage	9.0 K	2008-12-19 - 18:38	ThiagoTomei	ttbar - Xsec vs number of jets - exclusive
png	ttbar_inclusive.png	r1	manage	9.3 K	2008-12-19 - 18:39	ThiagoTomei	ttbar - Xsec vs number of jets - inclusive

Topic revision: r13 - 2008-12-22 - ThiagoTomei

antalya escort bursa escort eskisehir escort istanbul escort izmir escort