Gauge symmetries play a central role, both in the mathematical foundations as well as the
conceptual construction of modern (particle) physics theories. However, it is yet unclear …

There is solid consensus among physicists and philosophers that, in gauge field theory, for a
quantity to be physically meaningful or real, it must be gauge-invariant. Yet, every …

We investigate the phenomenological consequences of a strict gauge-invariant formulation
of the Higgs particle. This requires a description of the observable scalar particle in terms of …

We propose relativistic Luttinger fermions as a new ingredient for the construction of
fundamental quantum field theories. We construct the corresponding Clifford algebra and …

We study vector-boson scattering of the physical, gauge-invariant states in a reduced
standard-model setup on the lattice for various parameter sets. To this end, the phase shift in …

The spectral properties of a set of local gauge (BRST) invariant composite operators are
investigated in the SU (2) Yang–Mills–Higgs model with a single Higgs field in the …

A bstract Grand unification of gauge couplings and fermionic representations remains an
appealing proposal to explain the seemingly coincidental structure of the Standard Model …

A bstract The spectral properties of a set of local gauge-invariant composite operators are
investigated in the U (1) Higgs model quantized in the't Hooft R ξ gauge. These operators …

The renormalization properties of two local gauge invariant composite operators (O, R μ a)
corresponding, respectively, to the gauge invariant description of the Higgs particle and of …

A bstract The content of two additional Ward identities exhibited by the U (1) Higgs model is
exploited. These novel Ward identities can be derived only when a pair of local composite …