Exporting a model file of LanHEP to CalcHEP

1. Compile a model file.

2. Generate Events with CalcHEP.

Compiling model file

1. Let's assume that your model file (in this case, "mc4bsm.mdl") in the mdl directory in the lanhep315 folder.

   • Usually, it would be better to make a separate folder for a complied model files.I

   • In the lanhep315 folder, let's make a tutorial folder

     • mkdir tutorial

   • Compile the model file by run lhep executable file,

     • ./lhep -OutDir tutorial mdl/mc4bsm.mdl -CalcHEP

   • The above command will compile mc4bsm.mdl file in the mdl folder and produce files for calchep in a tutorial folder.

Importing a model inside CalcHEP

1. From now on, we will assume that your lanhep is installed in the following folder,

   • $HOME/MC4BSM/lanhep315

2. Launch CalcHEP in the CalcHEP user directory.

3. After launch CalcHEP,

1. Go to "IMPORT MODEL" section, enter

1. Keep pushing enter keys

1. DONE! After importing a model file, you can exit by push 'esc' button.

2. Now, we can do "Physics" with our own model.

Generating Events using CalcHEP batch mode.

1. Explained in the following tutorial by Neil Christensen HERE

   1. But we need to modify batch_file as followings, (Due to the difference for the notation of anti-particles)

      1. • 1. bath_lanhep

              1. • 1. Model: MC4BSM_feynman

                   2. Gauge: Feynman

                   3. Process: p,p->uv,Uv

                   4. Decay: uv->u,p1

                   5. Decay: Uv->U,p1

                   6. Decay: uv->u,p2

                   7. Decay: Uv->U,p2

                   8. Decay: p2->e,Ev

                   9. Decay: p2->E,ev

                   10. Decay: ev->e,p1

                   11. Decay: Ev->E,p1

                   12. Composite: p=u,U,d,D,G

                   13. pdf1: cteq6l (proton)

                   14. pdf2: cteq6l (proton)

                   15. p1: 4000

                   16. p2: 4000

                   17. Number of events (per run step): 10000

                   18. Filename: MC4BSM

                   19. Parallelization method: local

                   20. Max number of cpus: 2

                   21. sleep time: 1

                   22. nSess_1: 5

                   23. nCalls_1: 10000

                   24. nSess_2: 5

                   25. nCalls_2: 100000

2. Let's save this file with different name from the one in CalcHEP tutorial. save it "batch_file_lanhep"

3. In the CalcHEP user directory,

• • • ./calchep_batch batch_file_lanhep

Files:

• You can download at the bottom of this webpage:

  1. mc4bsmLanHEP.tar.gz : A model file for CalcHEP (Generated by LanHEP)

  2. batch_file_lanhep : A batch file for CalcHEP to generate events

Matrix Element Method using CalcHEP HERE