Changes between Version 2 and Version 3 of 2HDM
- Timestamp:
- Feb 16, 2010, 11:35:49 PM (15 years ago)
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2HDM
v2 v3 26 26 In the current implementation of the 2HDM into FeynRules, the user has to provide numerical values for all the lambda_i parameters in the Higgs basis, together with the charged Higgs mass. The other parameters of the potential, such as the \mu_i, are then deduced from these inputs. Contrary, the T matrix must be calculated externally. This, together with the change of basis required if the user wants to provide potential parameters and Yukawa coupling values in bases different from the Higgs basis, as it is often the case, can be done using the ''TwoHiggsCalc'' calculator introduced for the original implementation of the 2HDM in MadGraph. This code has been modified to produce a parameter file compatible with the present implementation. This calculator can also be used to calculate the required Higgs boson tree-level decay widths. It can be found at 27 27 28 ["http://cp3wks05.fynu.ucl.ac.be/Calculators/TwoHiggsCalc/index.html"] 28 http://cp3wks05.fynu.ucl.ac.be/Calculators/TwoHiggsCalc/index.html 29 29 30 30 === References === … … 33 33 === Model files === 34 34 * [http://europa.fyma.ucl.ac.be/~duhr/twiki/pub/Main/2HDM/2HDM.tar.gz 2HDM.tar.gz]: This archive contains all the model files. Should be expanded in the FR model directory. 35 * [http://europa.fyma.ucl.ac.be/~duhr/twiki/pub/Main/2HDM/HBreal.rst HBreal.rst]: Additionnal restriction file to define all parameters as being r ule, to be used, for example, with !CalcHEP<a rel="nofollow" href="http://feynrules.phys.ucl.ac.be/edit/Main/CalcHEP?topicparent=Main.2HDM" title="Create this topic">?</a>35 * [http://europa.fyma.ucl.ac.be/~duhr/twiki/pub/Main/2HDM/HBreal.rst HBreal.rst]: Additionnal restriction file to define all parameters as being real, to be used, for example, with !CalcHEP<a rel="nofollow" href="http://feynrules.phys.ucl.ac.be/edit/Main/CalcHEP?topicparent=Main.2HDM" title="Create this topic">?</a> 36 36 37 37 === Instructions === … … 44 44 * [http://europa.fyma.ucl.ac.be/~duhr/twiki/pub/Main/2HDM/2HDM.nb 2HDM.nb] : This is an example Mathematica® notebook that loads the model and calculates Feynman rules. 45 45 * [http://europa.fyma.ucl.ac.be/~duhr/twiki/pub/Main/2HDM/param_card_FR.dat param_card_FR.dat] : This is an example of LHA parameter file to be used with this model. It also contains the defalut values used for validation. 46 === <a name="Validation"></a><a name="_Validation"></a> <a name="Validation"></a>Validation ===46 === Validation === 47 47 * [http://europa.fyma.ucl.ac.be/~duhr/twiki/pub/Main/2HDM/PSPoints.jpg Phase space point comparison with stock version] 48 48 * [http://europa.fyma.ucl.ac.be/~duhr/twiki/pub/Main/2HDM/TANU.jpg Cross section comparison, for tau/nu_tau initial state]