Changes between Version 8 and Version 9 of SMEFTatNLO

Timestamp:

Aug 12, 2019, 11:25:26 AM (5 years ago)

Author:

Ken Mimasu

Comment:

--

SMEFTatNLO

@@ -22 +22 @@
 The  [https://feynrules.irmp.ucl.ac.be/attachment/wiki/SMEFTatNLO/definitions.pdf definitions.pdf] document specifies the operators definitions, normalisations and coefficient names in the UFO model
 === Usage notes ===
-Because of the mixture of LO/NLO compatible operators included in the model, restriction cards must be used to access the SMEFT interactions. Default loading of the model
+==== Restriction cards ====
+Because of the mixture of LO/NLO compatible operators included in the model, restriction cards must be used to access the SMEFT interactions. 
+
+Default loading of the model
 {{{
  > import model SMEFTatNLO_U2_2_U3_3_cG_4F_LO_UFO
@@ -39 +42 @@
 This invokes a restricted set of operators for which the required counterterms are implemented.
 
+==== Coupling orders ====
+
 We recommend specifying the full {{{QCD}}}, {{{QED}}} and {{{NP}}} orders for process generation.
 
@@ -47 +52 @@
 }}}
 Generates the NLO QCD top pair production process including the QCD-induced SM and the SMEFT contributions.
+
+==== Excluding operators ====
+
+We recommend avoiding setting values of Wilson coefficients to 0 when computing at NLO using MadGraph5_aMC@NLO. 
+
+Operators should either be removed explicitly with restriction cards or set to a very small non-zero value, e.g., 1e-10
 === Model Files ===
 * [https://feynrules.irmp.ucl.ac.be/attachment/wiki/SMEFTatNLO/SMEFTatNLO_U2_2_U3_3_cG_4F_LO_UFO.20190812.tgz SMEFTatNLO_U2_2_U3_3_cG_4F_LO_UFO.tgz] : archive of UFO model - 4 fermion and c,,G,, operators at LO, U(2)^2^ x U(3)^3^ flavor symmetry