SMEFT ATLAS of F = 2 transitions
Sep 15, 2020
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Abstract: (Springer)
We present a model-independent anatomy of the ∆F = 2 transitions K−, B− and D− in the context of the Standard Model Effective Field Theory (SMEFT). We present two master formulae for the mixing amplitude [M]. One in terms of the Wilson coefficients (WCs) of the Low-Energy Effective Theory (LEFT) operators evaluated at the electroweak scale μ and one in terms of the WCs of the SMEFT operators evaluated at the BSM scale Λ. The coefficients entering these formulae contain all the information below the scales μ and Λ, respectively. Renormalization group effects from the top-quark Yukawa coupling play the most important role. The collection of the individual contributions of the SMEFT operators to [M] can be considered as the SMEFT atlas of ∆F = 2 transitions and constitutes a travel guide to such transitions far beyond the scales explored by the LHC. We emphasize that this atlas depends on whether the down-basis or the up-basis for SMEFT operators is considered. We illustrate this technology with tree-level exchanges of heavy gauge bosons (Z′, G′) and corresponding heavy scalars.Note:
- 76 pages, 13 figures
- QCD Phenomenology
- new physics
- scale: electroweak interaction
- renormalization group: effect
- gauge boson: heavy
- scalar
- Z'
- coupling: Yukawa
- top: coupling
- ATLAS
References(100)
Figures(18)
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