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arXiv · 1012.2781

The Aoki phase revisited

V. Azcoiti·G. Di Carlo·E. Follana·A. Vaquero
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Abstract

In order to elucidate the vacuum structure of the Aoki phase, we carried out a numerical investigation of QCD with two flavours of Wilson fermions, within the p.d.f. framework and in the absence of external sources. The simulations performed at V = 44 suggest a rich vacuum structure, where the observable $i\barψγ_5ψ$ is allowed to take non-zero values of the same order of magnitude than the order parameter of the Aoki phase $i\barψγ_5τ_3ψ$. However, the simulation at higher volumes V = 6^4 suffers from large statistical errors.

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V. Azcoiti, G. Di Carlo, E. Follana, A. Vaquero. 2010-12-14. The Aoki phase revisited. https://arxiv.org/abs/1012.2781

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