Changes between Version 1 and Version 2 of MadOniaManual


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Timestamp:
03/20/12 16:29:57 (7 years ago)
Author:
trac
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  • MadOniaManual

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    3 == Manual: section on [:../../view/Software/MadOnia:MadOnia] ==
     3== Manual: section on [wiki:MadOnia MadOnia] ==
    44
    55MadOnia is a module that is deeply integrated in MadGraph/MadEvent. It can be seen as a specific implemented Model. For this reason, the procedure that you need to follow to generate a new quarkonium production process and then quarkonium events is very similar to the standard MG/ME procedure. In the description below, points where the syntax is specific to quarkonium production have been highlighted. For the rest, the reader is invited to have a look to the MadGraph help page.
    66
    7 === <a name="How_to_use_the_code"></a> How to use the code ===
     7=== [=#How_to_use_the_code] How to use the code ===
    88
    99Just like the other processes that are tractable in MG/ME, you can decide to generate a new quarkonium prcocess and/or quarkonium events via one of the MG/ME clusters, or you can download the full or process-dependent code and run it on your computer. The inputs that should be entered for a new analysis have the same format in both cases.
    10 ==== <a name="Edit_the_proc_card_dat_and_gener"></a> Generate a new process ====
     10==== [=#Edit_the_proc_card_dat_and_gener] Generate a new process ====
    1111
    1212You need to edit the file '''proc_card.dat:'''
    1313   * Enter the name of the process using the following format:
    1414
    15 {{{pp>jcc~[3P12to445]
     15{{{
     16pp>jcc~[3P12to445]
    1617}}}
    1718
    18 This corresponds to the production of a %$\chi_{c2}$% (PID=445) via an intermediate state with %$\normalsize 2S+1=3$%, %$\normalsize L=P$%, %$\normalsize J=2$%, %$\normalsize c=1$%, i.e. a spin-1, P-wave, color-singlet intermediate state. As another example:
     19This corresponds to the production of a $\chi_{c2}$ (PID=445) via an intermediate state with $\normalsize 2S+1=3$, $\normalsize L=P$, $\normalsize J=2$, $\normalsize c=1$, i.e. a spin-1, P-wave, color-singlet intermediate state. As another example:
    1920
    20 {{{pp>jbb~[1S01to551]
     21{{{
     22pp>jbb~[1S01to551]
    2123}}}
    2224
    23 corresponds to the production of an %$\normalsize \eta_b$% via a color-singlet transition. For color-octet tranistion, the color index should be set to 8. If you have in mind to pass the events through Pythia for the showering and hadronization, you must be careful with the PI number of the state. Indeed, pythia uses a special label that contains the information on the color. For example, the PI number that should be used for the production of a J/psi via a color-octet transition is 9900443;
    24 {{{pp>jcc~[3S18to9900443]}}}
     25corresponds to the production of an $\normalsize \eta_b$ via a color-singlet transition. For color-octet tranistion, the color index should be set to 8. If you have in mind to pass the events through Pythia for the showering and hadronization, you must be careful with the PI number of the state. Indeed, pythia uses a special label that contains the information on the color. For example, the PI number that should be used for the production of a J/psi via a color-octet transition is 9900443;
     26{{{
     27pp>jcc~[3S18to9900443]
     28}}}
    2529
    2630'''Also, pay attention:'''
     
    2832the heavy-quark pair must be placed in that order, and at the end! For example,
    2933
    30 {{{pp&gt;jc~c[3P18to443]
     34{{{
     35pp>jc~c[3P18to443]
    3136}}}
    3237
    3338or
    3439
    35 {{{pp&gt;cc~[3P18to443]j
     40{{{
     41pp>cc~[3P18to443]j
    3642}}}
    3743
     
    4753==== Generate parton-level events ====
    4854
    49 You need to edit the usual files. If you edit the file param_card.dat, you will see that in addition to the sm parameters, you have a block called LDME. The parameters in this block correspond to the long distance matrix elements, expressed in the BBL normalization (see hep-ph/9407339). You can specify the value of the LDME's for each transition. The transition %$\normalsize n$% is indicated at the end of the line as a comment. For example, the line
     55You need to edit the usual files. If you edit the file param_card.dat, you will see that in addition to the sm parameters, you have a block called LDME. The parameters in this block correspond to the long distance matrix elements, expressed in the BBL normalization (see hep-ph/9407339). You can specify the value of the LDME's for each transition. The transition $\normalsize n$ is indicated at the end of the line as a comment. For example, the line
    5056
    5157{{{
     
    5763
    5864
    59 Note that only one LDME parameter is assigned to each transition %$^{2S+1}L_J^{[c]}$%. For example, for all the following processes
     65Note that only one LDME parameter is assigned to each transition $^{2S+1}L_J^{[c]}$. For example, for all the following processes
    6066
    61 || pp &gt;j cc~[3S18to443]  ||  color-octet %$\normalsize J/\psi$% production ||
    62 || pp &gt; jcc~[3S18to10441]  ||  color-octet %$\normalsize \chi_{c0}$% production ||
    63 || pp &gt; jbb~[3S18to100553]  ||  color-octet %$\normalsize \Upsilon(2S)$% production ||
     67|| pp >j cc~[3S18to443]  ||  color-octet $\normalsize J/\psi$ production ||
     68|| pp > jcc~[3S18to10441]  ||  color-octet $\normalsize \chi_{c0}$ production ||
     69|| pp > jbb~[3S18to100553]  ||  color-octet $\normalsize \Upsilon(2S)$ production ||
    6470
    6571the same LDME parameter will be used in the param_card.dat.
     
    96102
    97103
     104