Matching of gauge invariant dimension-six operators for b → s and b → c transitions
By Jason Aebischer, Andreas Crivellin, Matteo Fael, C. Greub. 2015
174 citations recorded by the source corpus.
A bstractNew physics realized above the electroweak scale can be encoded in a model independent way in the Wilson coefficients of higher dimensional operators which are in-variant under the Standard Model gauge group. In this article, we study the matching of the SU(3)C × SU(2)L × U(1)Y gauge invariant dimension-six operators on the standard B physics Hamiltonian relevant for b → s and b → c transitions. The matching is performed at the electroweak scale (after spontaneous symmetry breaking) by integrating out the top quark, W , Z and the Higgs particle. We first carry out the matching of the dimension-six operators that give a contribution at tree level to the low energy Hamiltonian. In a second step, we identify those gauge invariant operators that do not enter b → s transitions already at tree level, but can give relevant one-loop matching effects.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/ce065c9e531e1458e0f97064dd4f1829801348a9
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In Nuclear and High Energy Physics
- David M. Straub
- M. Jung
- Andrzej Buras
- W. Altmannshofer
- Jason Aebischer
- P. Stangl
- J. Camalich
- Alejandro Celis
Citations in the corpus
- Patterns of flavour violation in models with vector-like quarks (2016, methodology): “This fixes also the definition of the Wilson coefficients Cψ2φ2D (for more details see [32]) and the basis for the VLQ Yukawa couplings λ i .”
- Feynman rules for the Standard Model Effective Field Theory in Rξ-gauges (2017, unknown): “[30]).”
- Low-energy effective field theory below the electroweak scale: operators and matching (2017, background): “Such a matching has been presented in [16] for the subset of operators relevant for B -physics.”
- B-decay discrepancies after Moriond 2019 (2019, result): “Using the tree-level matching conditions from SMEFT onto WET [96, 97], we have checked that these results are consistent with the findings in [77].”
- Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, methodology): “In the framework of SMEFT, the SU(2)L gauge symmetry between tL and bL provides a direct constraint to the NP top-quark operators arising from the tree-level matching onto the B physics Hamiltonian [904, 1187].”