Changes between Initial Version and Version 1 of QuarkoniumProd

Timestamp:

Mar 20, 2012, 4:18:37 PM (13 years ago)

Author:

trac

Comment:

--

QuarkoniumProd

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+
+
+== Quarkonium MadGraph ==
+
+
+
+=== People ===
+   1. Pierre Artoisenet
+   1. Fabio Maltoni
+   1. Tim Stelzer
+
+=== Aim of the project ===
+Build an event generator for quarkonium physics. 
+
+=== Tools ===
+   * Madgraph/MadEvent v4 and StandAlone
+
+=== Work ===
+We have identified two phases: 
+
+   1. Add to MadGraph the possibility of generating pairs of heavy quarks (same or different flavors) with given quantum numbers, of spin, total angular momentum, color:  %$^{2S+1}L_J[1,8]$%,  for %$L=0,1$%.
+   1. Interface it to MadEvent for event generation.
+ 
+==== Physics results and papers writeup ====
+
+The paper phase 1 is out!
+[http://arxiv.org/abs/0712.2770 MadOnia paper] 
+
+
+=== Preliminary code ===
+The code phase 1 is done. The quarkonium amplitude generator has been interfaced with a basic phase space generator to produce cross sections and distributions.
+The code is available under request.
+In order to generate heavy quarkonium cross sections, you must:
+
+  '''1. Copy  the directory Template into my_proc'''
+
+  '''2. Edit the proc_card.dat in my_proc/Card/proc_card.dat.'''
+
+       You have to enter the parton-level process
+
+       IMPORTANT: THE HEAVY QQ bar PAIR MUST BE PLACED AT THE END OF THE LINE DEFINING THE PROCESS !!
+
+       The quantum numbers of the QQ bar pair are written in squared brackets using the spectroscopic notation
+
+       [(2S+1)LJC] with S=spin, L=orbital momentum, J= total momentum, C=color
+
+       For example, type gg>gcc~[3S11] if you want to consider gg > g + charmonium with S=1, L=0 J=1, c=1
+       (J/psi production via a color-singlet transition)
+
+       see also an example of proc_card.dat in the Template.
+
+  '''3. go into my_proc/bin and type "./newprocess"'''
+
+  '''4. Fill in the two input files my_proc/Cards/param_card.dat and my_proc/Cards/run_card.dat'''
+
+  '''5. go to my_proc/SubProcesses/P???'''
+
+       P??? is a specific process that you have requested in the proc_card.dat.
+
+  '''6.  type "make"  and then  ./cross_section'''  
+        
+       the PT and rapidity distributions of the quarkonium state are written in the file histogram.dat
+
+
+Remarks:
+
+   * We use the BBL normalization for the long distance matrix elements.
+
+
+=== MadOnia version II ===
+
+
+11/2008: Phase 2 is done! MG_ME is been upgraded with the MadOnia implementation. Production of quarkonium unweighted events has been successfully tested.
+
+
+
+-- Main.PierreArtoisenet - 25 Nov 2008
+
+
+
+
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+