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QCD at θ∼π reexamined: Domain walls and spontaneous CP violation

par Tytgat, Michel
Référence Physical Review D - Particles, Fields, Gravitation and Cosmology, 61, 11, page (1-9), 114009
Publication Publié, 2000-06

Article révisé par les pairs

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Résumé :

We consider QCD at θ∼π with two, one and zero light flavors Nf, using the Di Vecchia-Veneziano-Witten effective Lagrangian. For Nf=2, we show that CP is spontaneously broken at θ=π for finite quark mass splittings, z=md/mu≠1. In the z-θ plane, there is a line of first order transitions at θ=π with two critical end points, z*1