Signals of nonrenormalizable Lorentz and CPT violation at the LHC

TL;DR

This paper investigates potential signals of Lorentz and CPT violation in high-energy collider data, proposing methods to improve constraints on nonrenormalizable operators affecting quark interactions at the LHC.

Contribution

It introduces a novel approach to constrain Lorentz and CPT violation using LHC Drell-Yan data, including time-dependent analysis simulations, enhancing sensitivity over previous methods.

Findings

Constraints on Lorentz and CPT violation are derived from ATLAS and CMS data.

Simulated sidereal-time analysis indicates potential for significant sensitivity improvements.

Dedicated searches could surpass deep inelastic scattering constraints by up to three orders of magnitude.

Abstract

We examine nonrenormalizable Lorentz- and CPT-violating effective operators applied to the quark sector of the Standard Model. Using Drell-Yan events collected by the ATLAS and CMS Collaborations, several constraints are extracted from time-independent modifications of the cross section on the $Z$-boson pole. The sensitivity to time-dependent modifications are also estimated by simulating a sidereal-time analysis. Our results suggest a dedicated search can improve on constraints from deep inelastic scattering by up to three orders in magnitude.