Precision tests of third-generation four-quark operators: one- and two-loop matching
Ulrich Haisch, Luc Schnell
Abstract
A bstract We calculate the one- and two-loop matching corrections in the Standard Model effective field theory (SMEFT) that impact electroweak precision measurements and flavour physics observables, focusing on the contributions of third-generation four-quark operators. Our results provide a crucial ingredient for a model-independent analysis of constraints on beyond the Standard Model physics that primarily affects the sector of third-generation four-quark operators. Concise analytic expressions are provided for all considered precision observables, which should facilitate their inclusion into global SMEFT analyses.
Topics & Concepts
PhysicsParticle physicsObservableElectroweak interactionStandard Model (mathematical formulation)Effective field theoryPhysics beyond the Standard ModelQuarkMatching (statistics)FlavourThird generationTop quarkTheoretical physicsQuantum mechanicsGauge (firearms)Computer scienceMathematicsHistoryArchaeologyStatisticsTelecommunicationsParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsNeutrino Physics Research