Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session Q15: Particle & Fields Theory II
10:45 AM–12:33 PM,
Monday, April 15, 2019
Sheraton
Room: Plaza Court 4
Sponsoring
Unit:
DPF
Chair: Francisco Ponce, Stanford University
Abstract: Q15.00001 : Construction and applications of Lorentz-violating nonabelian gauge field theories
10:45 AM–10:57 AM
View Presentation Abstract
Presenter:
Zonghao Li
(Indiana University Bloomington)
Authors:
Zonghao Li
(Indiana University Bloomington)
V Alan Kostelecky
(Indiana University Bloomington)
Lorentz violation can emerge in certain theoretical schemes unifying General Relativity and the Standard Model, and it is a popular candidate for modifications to low-energy physics. The Standard-Model Extension (SME) is a comprehensive framework for describing Lorentz violation in the context of realistic effective field theory. All minimal SME operators are known, but the explicit construction of possible nonminimal operators of arbitrary mass dimension has been an open issue. In this talk, we present a method to construct arbitrary gauge-invariant Lorentz-violating operators in nonabelian field theories. Applied to quantum electrodynamics and quantum chromodynamics, the method establishes the Lagrange densities for Lorentz-violating QED and QCD. We study implications of these theories for experiments involving light-by-light scattering and deep inelastic scattering, and we use existing data to obtain first bounds on certain nonminimal SME coefficients.
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