Theta dependence of CP9 model
V. Azcoiti, G. Di Carlo, A. Galante, V. Laliena
Abstract
We apply to the CP9 model two recently proposed numerical techniques for simulation of systems with a theta term. The algorithms, successfully tested in the strong coupling limit, are applied to the weak coupling region. The results agree and errors have been evaluated and are at % level. The results scale well with the renormalization group equation and show that, for CP9 in presence of a theta term, CP symmetry is spontaneously broken at θ=π in the continuum limit.
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