Quark-sector Lorentz violation in $Z$-boson production

TL;DR

This paper investigates potential Lorentz symmetry violations in quark interactions during Z-boson production at the LHC, revealing how weak interaction properties can help detect subtle symmetry-breaking effects.

Contribution

It introduces a novel approach to constrain Lorentz violation in quark sectors using Z-boson production data, emphasizing parity-violating effects in unpolarized collisions.

Findings

Constraints on Lorentz violation coefficients for first two quark generations.

Parity-violating effects detectable in unpolarized Z-boson production.

First bounds established using LHC measurements.

Abstract

Quark-sector Lorentz violation is studied in the context of Drell-Yan dilepton production including effects from Z-boson exchange. We show the chiral nature of the weak interactions enables parity-violating and spin-dependent effects to be studied using unpolarized initial states. Constraints are placed on dimensionless and CPT-even coefficients for Lorentz violation for the first two generations of quarks using measurements from the Large Hadron Collider.