The Aoki phase revisited

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 obser...

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Bibliographic Details
Published in:arXiv.org 2010-12
Main Authors: Azcoiti, V, G Di Carlo, Follana, E, Vaquero, A
Format: Article
Language:English
Subjects:
Computer simulation
Fermions
Flavor (particle physics)
Order parameters
Online Access:Get full text
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Summary: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 \(i\bar\psi\gamma_5\psi\) is allowed to take non-zero values of the same order of magnitude than the order parameter of the Aoki phase \(i\bar\psi\gamma_5\tau_3\psi\). However, the simulation at higher volumes V = 6^4 suffers from large statistical errors.
ISSN:2331-8422