Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-11-24
Physics
High Energy Physics
High Energy Physics - Theory
4 pages, revtex
Scientific paper
We show how the gauge invariant formulation of QCD in terms of loops is free
from a hidden $\theta$ parameter and offers an alternative way to solve the
$U(1)_A$ puzzle.
Fort Hugo
Gambini Rodolfo
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