Dijet bounds on third-generation four-quark operators

TL;DR

This paper uses LHC dijet data to set bounds on ten third-generation four-quark operators within the Standard Model effective field theory, highlighting the impact of RG effects and two-loop corrections.

Contribution

It provides the first comprehensive analysis of all ten operators, including RG effects up to two-loop order, to improve bounds on third-generation four-quark interactions.

Findings

Bounds on five operators are stronger or comparable to existing limits.

Remaining five operators have weak bounds despite RG corrections.

RG effects enable probing of all ten operators from initial five.

Abstract

We use dijet measurements from the Large Hadron Collider to constrain ten third-generation four-quark operators in the Standard Model effective field theory. At tree level, only the five operators involving four bottom quarks are directly constrained, but renormalization group (RG) effects allow all ten operators to be probed. Our analysis includes the dominant leading-logarithmic RG contributions up to two-loop order. The resulting bounds for the first five operators are nominal stronger or comparable to current limits, while those for the remaining operators remain weak despite the inclusion of logarithmically enhanced corrections.