Beautiful and charming chromodipole moments

TL;DR

This paper derives bounds on chromodipole operators involving bottom and charm quarks within the Standard Model effective field theory, highlighting the neutron electric dipole moment as a key constraint.

Contribution

It provides the first comprehensive analysis of direct and indirect bounds on these operators, emphasizing the importance of neutron EDM measurements.

Findings

Neutron EDM severely constrains the imaginary parts of Wilson coefficients.

Dijet searches and Z-boson production weakly constrain the Wilson coefficients.

Flavor physics does not significantly constrain these operators.

Abstract

In the context of the Standard Model effective field theory we derive direct and indirect bounds on chromodipole operators involving the bottom and charm quark. We find that the experimental upper limit on the neutron electric dipole moment puts severe constraints on the imaginary parts of the Wilson coefficients of both chromodipole operators. The magnitudes of the Wilson coefficients are instead only weakly constrained by dijet searches and Z-boson production in association with bottom-quark jets. Flavour physics does not provide meaningful bounds.