Jordy de Vries

Is there room for CP violation in the top-Higgs sector?

We discuss direct and indirect probes of chirality-flipping couplings of the top quark to Higgs and gauge bosons, considering both CP-conserving and CP-violating observables, in the framework of the Standard Model effective field theory. In our analysis we include current and prospective constraints from collider physics, precision electroweak tests, flavor physics, and electric dipole moments (EDMs). We find that low-energy indirect probes are very competitive, even after accounting for long-distance uncertainties. In particular, EDMs put constraints on the electroweak CP-violating dipole moments of the top that are two to three orders of magnitude stronger than existing limits. The new indirect constraint on the top EDM is given by

Nucleon electric dipole moments and the isovector parity- and time-reversal-odd pion–nucleon coupling

|d_t| < 5 \cdot 10^{-20}

Nucleon electric dipole moment with the gradient flow: The θ-term contribution

e cm at

Lattice QCD spectroscopy for hadronic CP violation

90\%

New Leading Contribution to Neutrinoless Double- β Decay

C.L.

Electric Dipole Moment Results from lattice QCD

The isovector time-reversal- and parity-violating pion–nucleon coupling g_π^(1) is uniquely sensitive to dimension-six interactions between right-handed light quarks and the Standard Model Higgs doublet that naturally arises in left-right symmetric models. Recent work has used the g_π^(1)-induced one-loop contribution to the neutron electric dipole moment d_n, together with the present experimental d_n bound, to constrain the CP-violating parameters of the left-right symmetric model. We show that this and related analyses are based on an earlier meson theory d_n computation that is not consistent with the power-counting appropriate for an effective field theory. We repeat the one-loop calculation using heavy baryon chiral perturbation theory and find that the resulting d_n sensitivity to g_π^(1) is suppressed, implying more relaxed constraints on the parameter space of the left-right symmetric model. Assuming no cancellations between this loop contribution and other contributions, such as the leading order EDM low-energy constant, the present limit on d_n implies |g_π^(1)|≲1.1×10^(−10).

R-Parity Violation and Light Neutralinos at SHiP and the LHC

We propose a new method to calculate electric dipole moments induced by the strong QCD

Indirect Signs of the Peccei-Quinn Mechanism.

\theta

R-parity Violation and Light Neutralinos at CODEX-b, FASER, and MATHUSLA.

-term. The method is based on the gradient flow for gauge fields and is free from renormalization ambiguities. We test our method by computing the nucleon electric dipole moments in pure Yang-Mills theory at several lattice spacings, enabling a first-of-its-kind continuum extrapolation. The method is rather general and can be applied for any quantity computed in a

Improvements to Nucleon Matrix Elements within a

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