Changes between Version 18 and Version 19 of SMEFTatNLO

Timestamp:

Nov 9, 2020, 4:56:40 PM (4 years ago)

Author:

gdurieux

Comment:

--

SMEFTatNLO

@@ -45 +45 @@
 
 The {{{3.0.3-neworders}}} development branch ([https://bazaar.launchpad.net/~maddevelopers/mg5amcnlo/3.0.3-neworders/tarball tarball]) of MG is required for NLO predictions involving four-fermion operators and (in general) H^2^G^2^ with coefficient {{{cpG}}} not normalized with any power of g,,S,,.
-It also allows for a better control over coupling orders and, in particular, for the separate computation of linear and quadratic EFT contributions at NLO, in fixed order mode.
+It also allows for a better control over coupling orders and, in particular, for the separate computation of linear and quadratic EFT contributions at NLO.
+It is however only available for fixed order computations (i.e. not for event generation).
+Sufficiently coarse differential distributions can be obtained by implementing a FixedOrderAnalysis in Fortran (see examples in the corresponding subdirectory).
 A branch allowing for the separate computation of different orders in event-generation mode (with matching to parton shower) is being validated.
-The 2.X.X series of MadGraph5_aMC@NLO can handle bosonic and two-fermion operators at one-loop.
+
+The 2.X.X series of MadGraph5_aMC@NLO should be used for event generation (i.e. beyond fixed-order computations).
+It can handle bosonic and two-fermion operators at one-loop.
+The model should in that case be loaded with a restriction card where other coefficients are set to zero.
 
 
@@ -87 +92 @@
 
 For example:
-
 {{{
  > generate p p > t t~ QCD=2 QED=0 NP=2 [QCD]
@@ -96 +100 @@
 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-5
+Operators should either be removed explicitly with restriction cards or set to a very small non-zero value, e.g., 1e-5.
 
 ==== Plugin for b-quark Yukawa coupling and operator ({{{ymb}}} and {{{cbp}}}) ====