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Momentum-Space Topology of Standard Model

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arxiv hep-ph/9907456 v4 pith:B6X4CUUS submitted 1999-07-22 hep-ph cond-mathep-th

Momentum-Space Topology of Standard Model

classification hep-ph cond-mathep-th
keywords invariantsmomentum-spacebecomeelementarymassmodelphasestandard
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The momentum-space topological invariants, which characterize the ground state of the Standard Model, are continuous functions of two parameters, generated by the hypercharge and by the weak charge. These invariants provide the absence of the mass of the elementary fermionic particles in the symmetric phase above the electroweak transition (the mass protection). All the invariants become zero in the broken symmetry phase, as a result all the elementary fermions become massive. Relation of the momentum-space invariants to chiral anomaly is also discussed.

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