Lorentz and CPT Violation in Partons

TL;DR

This paper develops a framework for analyzing high-energy hadronic processes under Lorentz and CPT violation, extending the Standard-Model Extension to include factorization and parton-model descriptions, with applications to experimental data.

Contribution

It introduces a method to incorporate Lorentz and CPT violation into the factorization of hadronic processes using the Standard-Model Extension, including both minimal and nonminimal coefficients.

Findings

Derived cross sections for Lorentz-violating effects in hadronic processes

Estimated sensitivities to Lorentz violation from existing collider data

Demonstrated the applicability of the framework to current and future experiments

Abstract

A framework is presented for the factorization of high-energy hadronic processes in the presence of Lorentz and CPT violation. The comprehensive effective field theory describing Lorentz and CPT violation, the Standard-Model Extension, is used to demonstrate factorization of the hadronic tensor at leading order in electroweak interactions for deep inelastic scattering and for the Drell-Yan process. Effects controlled by both minimal and nonminimal coefficients for Lorentz violation are explored, and the equivalent parton-model description is derived. The methodology is illustrated by determining cross sections and studying estimated attainable sensitivities to Lorentz violation using real data collected at the Hadronen-Elektronen Ring Anlage and the Large Hadron Collider and simulated data for the future US-based electron-ion collider.