The U(1) and Strong CP Problem From the Loop Formulation Perspective
H. Fort, R. Gambini (IFFC, Montevideo, Uruguay)

TL;DR
This paper explores a gauge-invariant loop formulation of QCD that addresses the strong CP problem and offers a novel approach to the $U(1)_A$ puzzle, avoiding the hidden $ heta$ parameter.
Contribution
It introduces a loop formulation of QCD that is free from the hidden $ heta$ parameter and provides an alternative solution to the $U(1)_A$ puzzle.
Findings
Loop formulation is gauge invariant and free from the hidden $ heta$ parameter.
Provides an alternative solution to the $U(1)_A$ puzzle.
Offers new insights into solving the strong CP problem.
Abstract
We show how the gauge invariant formulation of QCD in terms of loops is free from a hidden parameter and offers an alternative way to solve the puzzle.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Black Holes and Theoretical Physics
