Abstract
We explore CP-violating (CPV) effects of heavy New Physics in flavour-changing quark dipole transitions, within the framework of Standard Model Effective Field Theory (SMEFT). First, we establish the relevant dimension six operators and consider the Renormalisation Group (RG) evolution of the appropriate Wilson coefficients. We investigate RG-induced correlations between different flavour-violating processes and electric dipole moments (EDMs) within the Minimal Flavour Violating and U(2)3 quark flavour models. At low energies, we set bounds on the Wilson coefficients of the dipole operators using CPV induced contributions to observables in non-leptonic and radiative B, D and K decays as well as the neutron and electron EDMs. This enables us to connect observable CPV effects at low energies and general NP appearing at high scales. We present bounds on the Wilson coefficients of the relevant SMEFT operators at the high scale Λ = 5 TeV, and discuss most sensitive CPV observables for future experimental searches.
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Acknowledgments
We thank Luka Leskovec for discussions on the hadronic matrix elements and Ajdin Palavrić for useful discussions on the spurion expansions. The authors acknowledge the financial support from the Slovenian Research Agency (grant No. J1-3013 and research core funding No. P1-0035).
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Fajfer, S., Kamenik, J.F., Košnik, N. et al. New Physics in CP violating and flavour changing quark dipole transitions. J. High Energ. Phys. 2023, 133 (2023). https://doi.org/10.1007/JHEP10(2023)133
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DOI: https://doi.org/10.1007/JHEP10(2023)133