A Lower Bound on hadronic EDMs from CP Violation in D0-D0bar mixing in SUSY Alignment Models

TL;DR

This paper shows that in SUSY alignment models, observable CP violation in D0-D0bar mixing implies a lower bound on hadronic EDMs, linking these phenomena as evidence for new physics beyond the Standard Model.

Contribution

It establishes a direct connection between CP violation in D meson mixing and lower bounds on hadronic EDMs within SUSY alignment models, providing testable predictions.

Findings

Detectable CP violation in D0-D0bar mixing implies lower bounds on hadronic EDMs.

Correlation between CP asymmetries in D decays and EDMs supports SUSY alignment models.

Evidence of CP violation and EDMs together would favor SUSY alignment over other SUSY models.

Abstract

The SM predictions for CP violating effects in D meson systems are highly suppressed at the per mill level. Therefore, any experimental evidence for a sizable CP violation in D0-D0bar mixing would unambiguously point towards a New Physics (NP) signal. Within supersymmetric scenarios, the popular alignment models can naturally account for large, non-standard effects in D0-D0bar mixing. We demonstrate that, within alignment models, detectable CP violating effects in D0-D0bar mixing would unambiguously imply a lower bound for the electric dipole moment (EDM) of hadronic systems, like the neutron EDM and the mercury EDM, in the reach of future experimental sensitivities. The simultaneous evidence of CP violation in D meson systems together with non vanishing hadronic EDMs would strongly support the idea of SUSY alignment models and disfavour gauge-mediated SUSY breaking models, SUSY models with MFV and non-Abelian SUSY flavour models. As a byproduct of our analysis, we study the correlation between the time dependent CP asymmetry in decays to CP eigenstates S_f and the semileptonic asymmetry a_SL both model independently and in SUSY alignment models.