Nguyen Do

6 Feb 2020:

-Install MADGRAPH on local machine

-Set up PYTHIA8 (shower/hadronization) in MADGRAPH

-Generate MG5_aMC>generate p p > t t~ process

20 Feb 2020:

- Meeting with Soubhik Kumar 

- Getting an account for T3 Cluster

- Running into trouble by using "scp" because of too many wrong input of the account name

21 Feb 2020:

- Regain access to the account

- Install MADGRAPH, Pythia, Delphes on the Cluster (not successful with Delphes since there is no ROOT)

- Missing Fortran compiler on the cluster (need to find out how to install it on the cluster)

25 Feb 2020:

- Install ROOT, Delphes on local machine, and everything works fine

- Testing the process of p p > t t~ , t > b e+ ve , t~ > b~ mu- vm~ on MADGRAPH. At first, the default number of events for run_card.dat parameter is 10000. Since I run quite a lot of background applications, the computer froze. 

- Reducing the number of events to 100. However, plots that was produced by this run is quite different from the one we had in the meting.

3 Mar 2020

- Use "scram arch" to figure out the architecture

- Use quick google search to find out the version of CMSSW version

- Set up CMSSW 10_2_6

- wget MADGRAPH in CMSSW 10_2_6/src

- pythia-pgs work fine. However, "install Delphes" is not working

5 Mar 2020

- Got everything up and working by using CMSSW 8_0_22 instead of CMSSW 10_2_6. However, in the future, it is still useful to check out the above process since it could help identify the correct architecture for the Cluster.

10 Mar 2020:

- Create a new logbooks on the course website

17 Mar 2020:

- Generate 1000 events for p p > gr, (gr > r r, r > j j, r > j j) to get the cross section values for the signal using the default run.card . 

- Generate the same process using preselection ptj1min ≥ 600 GeV, ptj2min ≥ 400 GeV, ptj3min ≥ 200 GeV, ptj4min ≥ 100 GeV and  etaj <= 2.5 and etab <= 2.5; drbj >= 0.4:

- Used to have permission problems with the background. However, we fixed it using other version of Madgraph (2.7.2).

Mar 30 2020:

- By using Madgraph 2.7.2, the run_card.dat of the imported KKGraviton models does not display the cut for pt, or eta. Therefore, we need to use version 2.6.7 for the signals.

Mar 31 2020:

- Successfully simulate the backgrounds with preselection using Madgraph 2.6.7. In addition, by using Mathematica, we are able to filter out some events from the initial 10000 events. The resulting cross-sections and remaining events are: