Quantum Effects on Four-Dimensional Space-Time Symmetries

Details Quantum Effects on Four-Dimensional Space-Time Symmetries Quantum Effects on Four-Dimensional Space-Time Symmetries

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phrvl..53.2219n&link_type=abstract

Physical Review Letters, Volume 53, Issue 23, December 3, 1984, pp.2219-2221

Physics

22

Gauge Field Theories, Lorentz And Poincare Invariance

Scientific paper

It is shown that, in gauge theories of chiral Weyl fermions, quantum effects can induce breakdowns of relativistic space-time symmetries in four dimensions. These so-called "anomalies" are caused by U(1) gauge fields, and in combination with gravitational field; non-Abelian gauge fields have no effect. In the standard Glashow-Weinberg-Salam SU(2) ⊗ U(1) model, the U(1) charges of the chiral fermions are such that, within each family, these relativistic anomalies cancel out for leptons and quarks separately.

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