We propose a new mechanism for up-down symmetry breaking within the context of a technicolor scenario. The experimentally determined ratio VM cost3 z w = 1 is in addition preserved at the technicolor scale. If we assume that the mechanism works at the level of the heaviest generation we find m t = (f-%)38 GeV. The parameter f depends on strong technicolor dynamics and can in principle be determ...

Within a supersymmetric unified framework we explore the resolution of the gauge hierarchy problem taking account of the non-renormalizable terms in the superpotential. For [SU (3)] 3 supplemented by a discrete R parity, we find the remarkable property that the vacuum configuration corresponding to the correct gauge symmetry breaking remains flat (in the supersymmetric limit) to all orders in M...

Symmetry breaking involves coloring the elements of a structure so that the only automorphism which respects the coloring is the identity. We investigate how much information we would need to be able to compute a 2-coloring of a computable finite-branching tree under the predecessor function which eliminates all automorphisms except the trivial one; we also generalize to n-colorings for fixed n...

In orbifold gauge theories localized tadpoles can be radiatively generated at the fixed points where U(1) subgroups are conserved. If the Standard Model Higgs fields are identified with internal components of the bulk gauge fields (Higgs-gauge unification) in the presence of these tadpoles the Higgs mass becomes sensitive to the UV cutoff and electroweak symmetry breaking is spoiled. We find th...

The talks presented at the conference are summarized from an angle of a particle theorist. After presenting a personal impression on the conference, particular emphasis is placed on the spin structure of nucleons and symmetry breaking test.

In a recently proposed extension of the Standard Model with a compact extra dimension of size R we compute the leading corrections, of relative order (mtR) 2, to the Branching Ratio BR(B → Xsγ). For R = (370 ± 80GeV )−1 the branching ratio is increased in a significant way relative to the SM, although not at the level of being inconsistent with present measurements.

We construct basis-independent expressions that measure the magnitude of R-parity breaking due to possible superpotential terms in the Minimal Supersymmetric extension of the Standard Model, in the absence of soft supersymmetry-breaking terms and spontaneous gauge symmetry breaking. We also discuss briefly their application to a consistent treatment of cosmological constraints on R-parity viola...

We perform a renormalisation group analysis of the next-to-minimal su-persymmetric standard model (NMSSM) based on the following constraints: two-loop gauge coupling unification at a variable scale M X , running the gauge couplings through the low energy thresholds; universal soft supersym-metry breaking parameters; correct electroweak symmetry breaking. The phenomenological implications of our...

We discuss the parameterization for electroweak gauge boson interactions without a light Higgs boson. We present the constraints on the anomalous gauge-boson couplings from the current experiments. We emphasize that the four-point couplings involving the longitudinal weak bosons are genuine to the underlying strong dynamics responsible for the electroweak symmetry breaking. We study the sensiti...

We point out that if the fourth generation neutrino is a Majorana fermion, then the astrophysical constraints coupled with the precision measurements of the Z-width at LEP require that the corresponding B-L symmetry is unlikely to be a spontaneously broken global symmetry. If B-L is chosen to be a local symmetry, its breaking scale should be less than a few TeV.