Extends EFT formalism for neutrino oscillations with matter effects, derives analytical observables, and extracts first bounds on non-standard interaction parameters from JUNO dataset.
The CKM parameters in the SMEFT
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abstract
The extraction of the Cabibbo-Kobayashi-Maskawa (CKM) matrix from flavour observables can be affected by physics beyond the Standard Model (SM). We provide a general roadmap to take this into account, which we apply to the case of the Standard Model Effective Field Theory (SMEFT). We choose a set of four input observables that determine the four Wolfenstein parameters, and discuss how the effects of dimension-six operators can be included in their definition. We provide numerical values and confidence intervals for the CKM parameters, and compare them with the results of CKM fits obtained in the SM context. Our approach allows one to perform general SMEFT analyses in a consistent fashion, independently of any assumptions about the way new physics affects flavour observables. We discuss a few examples illustrating how our approach can be implemented in practice.
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hep-ph 1years
2026 1verdicts
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EFT for Neutrino Oscillations: Theory Developments and Application to JUNO
Extends EFT formalism for neutrino oscillations with matter effects, derives analytical observables, and extracts first bounds on non-standard interaction parameters from JUNO dataset.