Séminaire de Physique Théorique
Momentum space topology of Electroweak theory and QCDMikhail Zubkov (Le Studium/LMPT)
Thursday 15 December 2016 14:00 - Tours - Salle 1180 (Bât E2)
Résumé :
Study of the Weyl and Dirac topological materials (topological semimetals, insulators, superfluids and superconductors) opens the route for the investigation of the topological quantum vacua of relativistic fields. The symmetric phase of the Standard Model (SM), where both electroweak and chiral symmetry are not broken, represents the topological semimetal. The vacua of the SM (and its extensions) in the phases with broken Electroweak symmetry represent the topological insulators of different types. We discuss the topological invariants in both symmetric and broken phases and establish their relation to the stability of vacuum. In our consideration we concentrate on the symmetric phase of the Weinberg – Salam model, and on its broken phase with the emphasis in neutrino sector. Also we discuss hadronic phase (HP), and the color - flavor locking (CFL) phase of QCD. The formalism is developed, which relates the topological invariants in momentum space and massless fermions that reside on vortices in the CFL phase. (following : arXiv:1608.07777 and arXiv:1610.08041)
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