Changes between Version 31 and Version 32 of SMEFTatNLO


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Timestamp:
Dec 2, 2021, 12:17:24 PM (3 years ago)
Author:
gdurieux
Comment:

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  • SMEFTatNLO

    v31 v32  
    3131Top-quark flavour-changing interactions, not compatible with the imposed flavour symmetry, are not included (see the loop-capable [https://feynrules.irmp.ucl.ac.be/wiki/TopFCNC TopFCNC] implementation).
    3232
    33 Unlike prescribed by the LHC TOP WG, the top quark chromomagnetic-dipole operator coefficient {{{ctG}}} is normalised with a factor of the strong coupling, g,,S,,.
    34 This normalisation factor temporarily ensures compatibility with the 2.X.X series of MadGraph5_aMC@NLO but may be dropped in the future.
     33Unlike prescribed by the LHC TOP WG, the top quark chromomagnetic-dipole operator (with coefficient {{{ctG}}}) is normalised with a factor of the strong coupling, so that {{{ctG_LHCTOPWG = gS ctG_SMEFTatNLO}}}.
     34This may however change in the future.
     35In both 2.X.X and 3.X.X series of MadGraph5_aMC@NLO, already at LO, such a normalization is notably required for jet merging, systematics computation, and the default dynamical scale.
     36It is also required for NLO computations in the 2.X.X series.
    3537As with every other appearance of this coupling in MadGraph5_aMC@NLO, its value is renormalisation-group evolved to the QCD renormalisation scale (set in the run_card).
    3638