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Spontaneous $CP$ breaking in QCD and the axion potential: an effective Lagrangian approach

Using the well-known low-energy effective Lagrangian of QCD — valid for small (non-vanishing) quark masses and a large number of colors — we study in detail the regions of parameter space where CP is spontaneously broken/unbroken for a vacuum angle θ = π. In the CP broken region there are first orde...

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Detalles Bibliográficos
Autores principales:	Di Vecchia, Paolo, Rossi, Giancarlo, Veneziano, Gabriele, Yankielowicz, Shimon
Lenguaje:	eng
Publicado:	2017
Materias:	gr-qc General Relativity and Cosmology hep-th Particle Physics - Theory
Acceso en línea:	https://dx.doi.org/10.1007/JHEP12(2017)104 http://cds.cern.ch/record/2282514

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