Changes between Version 28 and Version 29 of SMEFT


Ignore:
Timestamp:
09/17/17 21:27:28 (2 years ago)
Author:
IlariaBrivio
Comment:

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  • SMEFT

    v28 v29  
    1616
    1717
    18 The SMEFT is constructed out of a series of SU(3),,C,, × SU(2),,L,, × U(1),,Y,, invariant (local and analytic) higher dimensional operators L,,6,,, L,,7,,, ... built out of the SM fields.
     18The SMEFT is constructed out of a series of SU(3),,C,, × SU(2),,L,, × U(1),,Y,, invariant (local and analytic) higher dimensional operators L,,6,,, L,,7,,, ... built out of the SM fields.[[BR]]
    1919The SMEFTsim package provides a complete implementation of the dimension-6 Lagrangian adopting the Warsaw basis [https://arxiv.org/abs/1008.4884]
    2020
    21 The SM Lagrangian is extended with the inclusion of the complete set of baryon-number-conserving operators of the Warsaw basis and of the SM loop-induced  Higgs couplings to gg, γγ and Zγ.
     21The SM Lagrangian is extended with the inclusion of the complete set of baryon-number-conserving operators of the Warsaw basis and of the SM loop-induced  Higgs couplings to gg, γγ and Zγ. [[BR]]
    2222Importantly, field rotations required to have canonically normalized kinetic terms and parameter redefinitions following from the choice of an input parameters set are automatically applied in the Lagrangian.
    2323
     
    2727The flavor symmetry assumptions adopted are (see [https://arxiv.org/abs/1709.xxxxx] for a detailed description)
    2828* The flavour general case
    29 * The U(3)^5 flavor symmetric case, with possible non-SM CP-violating phases
     29* The U(3)^{5} flavor symmetric case, with possible non-SM CP-violating phases
    3030* A linear Minimal flavor violation (MFV) ansatz, in which non-SM CP-violating effects are neglected, but flavor-violation spurion insertions are allowed in quark currents
    3131
     
    3434* m,,W,, scheme: {m,,W,,, m,,Z,, , G,,f,,}
    3535
    36 Two independent sets (A and B) are supplied. Each set contains a main file, a number of subroutines and restriction files.
     36Two independent models sets (A and B) are supplied. Each set contains a main file, a number of subroutines and restriction files.
     37The two sets differ in the structure and in the technical implementation of L,,6,,, but they produce consistent results. The use of both sets is recommended for debugging and validation of the numerical results.[[BR]]
    3738Pre-exported UFO files to be interfaced with MadGraph5_aMC@NLO can also be downloaded on this page (see Table below).
    3839
    39 Note that the two sets differ in the structure and in the technical implementation of L,,6,,, but they produce consistent results. The use of both sets is recommended for debugging and validation of the numerical results.
    4040
    4141We appreciate if you could report us any inconsistency or bugs.
     
    4747In this spirit, it has not been optimized for loop calculations in the SM or in the SMEFT. In particular:
    4848
    49 * the Lagrangian assumes unitary gauge. Using it in R,,xi or Feynman gauge may lead to inconsistent results, as the ghost Lagrangian have not been modified to account for L,,6 corrections.
     49* the Lagrangian assumes unitary gauge. Using it in R,,{xi} or Feynman gauge may lead to inconsistent results, as the ghost Lagrangian have not been modified to account for L,,6 corrections.
    5050
    5151* the UFO files are not suitable for NLO evaluation in MadGraph5_aMC@NLO