Changes between Version 14 and Version 15 of ThreeSiteModel


Ignore:
Timestamp:
03/03/10 22:42:50 (10 years ago)
Author:
NeilChristensen
Comment:

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  • ThreeSiteModel

    v14 v15  
    1313=== References ===
    1414   * [http://www.slac.stanford.edu/spires/find/hep/www?eprint=hep-ph/0607124 Phys.Rev.D74:075011,2006]: This is the first description of the 3-Site Model.
    15    * [http://www.slac.stanford.edu/spires/find/hep/www?eprint=arXiv:0708.2588 Phys.Rev.D78:031701,2008] : This is a study of the LHC collider phenomenology of the 3-Site Model that uses the earlier !LanHEP version that this implementation was based on.
     15   * [http://www.slac.stanford.edu/spires/find/hep/www?eprint=arXiv:0708.2588 Phys.Rev.D78:031701,2008] : This is a study of the LHC collider phenomenology of the 3-Site Model that uses the earlier LanHEP version that this implementation was based on.
    1616   * [http://www.slac.stanford.edu/spires/find/hep/www?eprint=arXiv:0906.2474 arXiv:0906.2472] : This is the 2nd !FeynRules paper where this implementation was published. It contains a shortened version of the notes below.
    1717=== Model Files ===
     
    2121Details about the Minimal Higgsless Model can be found in the reference above. This implementation goes beyond that reference in two ways. It uses exact formulas for all the internal parameters and wavefunctions and the Goldstone bosons and ghosts are worked out in complete detail as is necessary for Feynman gauge. Full details about this implementation can be found in:
    2222   * [/attachment/wiki/ThreeSiteModel/3-Site.pdf 3-Site-Notes.pdf]: Notes giving the details of the model implementation.
    23    * [/attachment/wiki/ThreeSiteModel/3-Site-Model.pdf 3-Site-TeX.pdf]: Automatic !LaTeX output from this model.
     23   * [/attachment/wiki/ThreeSiteModel/3-Site-Model.pdf 3-Site-TeX.pdf]: Automatic LaTeX output from this model.
    2424
    2525=== Instructions ===
     
    3939=== Validation ===
    4040
    41 Over 200 2->2 processes were run in a variety of ways. First, each process was compared between the original !LanHEP implementation and the current !FeynRules implementation. Second, each process was run across multiple monte-carlos including !CalcHEP, !CompHEP, !MadGraph and Sherpa. Third, each process was run in two different gauges, namely Feynman gauge (in !CalcHEP and !CompHEP) and in unitary gauge (in !CalcHEP, !MadGraph and Sherpa). The cross section was computed for each process and compared to one another. Agreement to better than 1% was found for all processes. The parameters for these calculations were taken as in the model files above. The energies and cuts for these calculations were:
     41Over 200 2->2 processes were run in a variety of ways. First, each process was compared between the original LanHEP implementation and the current !FeynRules implementation. Second, each process was run across multiple monte-carlos including CalcHEP, CompHEP, !MadGraph and Sherpa. Third, each process was run in two different gauges, namely Feynman gauge (in CalcHEP and CompHEP) and in unitary gauge (in CalcHEP, !MadGraph and Sherpa). The cross section was computed for each process and compared to one another. Agreement to better than 1% was found for all processes. The parameters for these calculations were taken as in the model files above. The energies and cuts for these calculations were:
    4242||'''Particles involved'''||'''sqrt(s)'''||'''p_T'''||
    4343||Only SM||600GeV||20GeV||
     
    5252||||[/attachment/wiki/ThreeSiteModel/CS-VVVV-neutral.jpg VV->VV Processes (Neutral)]||||
    5353
    54 Each of these processes was also run at a single phase space point of the squared amplitude. In this test, only !CalcHEP in Feynman and unitary gauge and !MadGraph were used. It is planned to include Sherpa at a later date. The energies were chosen as in the cross section comparison. The angle was chosen to be 73.3 degrees. Agreement to better than 0.1% was found in all cases. Here are images of the results:
     54Each of these processes was also run at a single phase space point of the squared amplitude. In this test, only CalcHEP in Feynman and unitary gauge and !MadGraph were used. It is planned to include Sherpa at a later date. The energies were chosen as in the cross section comparison. The angle was chosen to be 73.3 degrees. Agreement to better than 0.1% was found in all cases. Here are images of the results:
    5555||[/attachment/wiki/ThreeSiteModel/PS-strong.jpg Strong Processes]||[/attachment/wiki/ThreeSiteModel/PS-ffAW.jpg ff->AW Processes]||[/attachment/wiki/ThreeSiteModel/PS-llll.jpg ll->ll Processes]||
    5656||[/attachment/wiki/ThreeSiteModel/PS-ffAA.jpg ff->AA Processes]||[/attachment/wiki/ThreeSiteModel/PS-ffZW.jpg ff->ZW Processes]||[/attachment/wiki/ThreeSiteModel/PS-llqq.jpg ll->qq Processes]||
     
    6262These tests were performed with the following versions of the software:
    6363|| '''Software'''||'''Version'''||
    64 ||!Mathematica||7.0.0||
     64||Mathematica||7.0.0||
    6565||!FeynRules||1.4.0||
    66 ||!CalcHEP||2.5.3||
    67 ||!CompHEP||4.4.104||
     66||CalcHEP||2.5.3||
     67||CompHEP||4.4.104||
    6868||!MadGraph||4.4.21||
    69 ||!Sherpa||Private development version||
     69||Sherpa||Private development version||
    7070