6533b7d3fe1ef96bd1260018
RESEARCH PRODUCT
Chiral fermions and gauge fixing in five-dimensional theories
Joannis PapavassiliouArcadi Santamariasubject
PhysicsNuclear and High Energy PhysicsParticle physicsCompactification (physics)High Energy Physics::LatticeFOS: Physical sciencesPropagatorFísicaFermionUniversal extra dimensionHigh Energy Physics - PhenomenologyTheoretical physicsHigh Energy Physics::TheoryHigh Energy Physics - Phenomenology (hep-ph)Gauge anomalyOrbifoldGauge fixingS-matrixdescription
We study in detail the issue of gauge-fixing in theories with one universal extra dimension, i.e. theories where both bosons and fermions display Kaluza-Klein (KK) excitations. The extra dimension is compactified using the standard orbifold construction for a massless chiral fermion. We carry out the gauge-fixing procedure at the level of the five-dimensional theory and determine the tree-level propagators and interaction vertices needed for performing perturbative calculations with the effective four-dimensional theory resulting after the compactification. The gauge-independence of the tree-level S-matrix involving massive KK modes is verified using specific examples. In order to obtain massive fermionic zero modes one has to enlarge the theory by introducing a set of mirror fermions, a construction which is carried out in detail. Finally, the gauge-independence of the tree-level S-matrix involving the resulting new mass-eigenstates is proved by resorting to generalized current conservation equations.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-02-02 |