Opening up baryon-number-violating operators

TL;DR

This paper systematically catalogs all possible tree-level UV completions for baryon-number-violating operators up to dimension 15, enhancing the understanding of potential new physics beyond the Standard Model.

Contribution

It provides an exhaustive set of UV completions for high-dimensional baryon-number-violating operators, including right-handed neutrinos, and offers a public code for matching operators.

Findings

Catalog of UV completions up to dimension 15

Inclusion of right-handed neutrinos in operators

Public code for operator matching

Abstract

Baryon number violation is our most sensitive probe of physics beyond the Standard Model. Its realization through heavy new particles can be conveniently encoded in higher-dimensional operators that allow for model-agnostic analyses. The unparalleled sensitivity of nuclear decays to baryon number violation makes it possible to probe effective operators of very high mass dimension, far beyond the commonly discussed dimension-six operators. To facilitate studies of this ginormous and scarcely explored testable operator landscape we provide the exhaustive set of tree-level UV completions consisting of scalars, fermions, and vectors for non-derivative baryon-number-violating operators in this Standard Model effective field theory up to mass dimension 15, which corresponds roughly to the border of sensitivity. In addition to the known Standard Model fields we also include right-handed neutrinos in our operators. Our public code can be used to UV-complete any non-derivative operator and match it onto an operator basis.