We propose to resolve the controversy regarding the stability of the monopolecondensation in QCD by calculating the imaginary part of the one-loop effectiveaction perturbatively. We calculate the imaginary part perturbatively to theorder $g^2$ with two different methods, with Fyenman diagram and withSchwinger's method. Our result shows that with the magnetic background theeffective action has no imaginary part, but with the electric background itacquires a negative imaginary part. This strongly indicates a stable monopolecondensation in QCD.
展开▼
机译：我们建议通过扰动地计算单环有效作用的虚部来解决有关QCD中单极冷凝稳定性的争议。我们用两种不同的方法，用Fyenman图和withSchwinger方法，对阶数$ g ^ 2 $进行微扰计算。我们的结果表明，在磁背景下，有效动作没有虚部，而在电背景下，有效动作得到了负虚部。这有力地表明了QCD中稳定的单极冷凝。
展开▼
