Changes between Version 43 and Version 44 of SMEFT
 Timestamp:
 09/19/17 18:59:54 (2 years ago)
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SMEFT
v43 v44 16 16 17 17 18 The Standard Model Effective Field Theory (SMEFT) is constructed out of a series of SU(3),,C,, × SU(2),,L,, × U(1),,Y,, invariant higher dimensional operators L ,,6,,, L,,7,,, ... built out of the SM fields.[[BR]]18 The Standard Model Effective Field Theory (SMEFT) is constructed out of a series of SU(3),,C,, × SU(2),,L,, × U(1),,Y,, invariant higher dimensional operators L^(6)^, L^(7)^, ... built out of the SM fields.[[BR]] 19 19 The SMEFTsim package provides a complete implementation of the lepton and baryon number conserving dimension6 Lagrangian adopting the Warsaw basis [https://arxiv.org/abs/1008.4884/ arXiv:1008.4884] 20 20 … … 22 22 23 23 24 The SMEFTsim package provides implementations for 3 different flavor assumptions and 2 input scheme choices, for a total of 6 different models.24 The SMEFTsim package provides implementations for 3 different flavor symmetry assumptions and 2 input scheme choices. 25 25 26 The flavor assumptions adopted are (see [https://arxiv.org/abs/1709.xxxxx/ arXiv:1709.xxxxx] for a detailed description)26 The flavor symmetry assumptions adopted are (see [https://arxiv.org/abs/1709.xxxxx/ arXiv:1709.xxxxx] for a detailed description) 27 27 * The flavour general case 28 * The U(3)^5^ flavor symmetric case, with possiblenonSM CPviolating phases28 * The U(3)^5^ flavor symmetric case, with nonSM CPviolating phases 29 29 * A linear Minimal flavor violation (MFV) ansatz [https://arxiv.org/abs/hepph/0207036/ arXiv:0207036], in which nonSM CPviolating effects are neglected, but linear flavorviolating spurion insertions are allowed in quark currents 30 30 31 31 For each model it is possible to choose between two input parameters sets for the electroweak sector, namely: 32 * α scheme: {α,,e m,,, m,,Z,, , G,,f,,}32 * α scheme: {α,,ew,,, m,,Z,, , G,,f,,} 33 33 * m,,W,, scheme: {m,,W,,, m,,Z,, , G,,f,,} 34 34 … … 36 36 37 37 Two independent models sets (A and B) are supplied. Each set contains a main file, a number of subroutines and restriction files. 38 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.[[BR]]38 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.[[BR]] 39 39 Preexported UFO files to be interfaced with MadGraph5_aMC@NLO can also be downloaded from this page (see Table below). 40 40 … … 48 48 In this spirit, it has not been optimized for loop calculations in the SM or in the SMEFT. In particular: 49 49 50 * 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,,6corrections.50 * the Lagrangian assumes unitary gauge. Using it in R,,ξ,, or Feynman gauge may lead to inconsistent results, as the ghost Lagrangian have not been modified to account for L^(6)^ corrections. 51 51 52 * the UFO files are not suitablefor NLO evaluation in MadGraph5_aMC@NLO52 * the UFO files are not equipped for NLO evaluation in MadGraph5_aMC@NLO 53 53 54 54 55 55 == Change log == 56 56 57 v1.0 ( 17.09.2017) The first version released57 v1.0 (20.09.2017) The first version released 58 58 59 59 == References ==