Little Higgs models have an enlarged global symmetry which makes the Higgs boson a pseudo-Goldstone boson. This symmetry typically contains spontaneously broken U(1) subgroups which provide light electroweak-singlet pseu-doscalars. Unless such particles are absorbed as the longitudinal component of Z ′ states, they appear as pseudoscalars in the physical spectrum at the electroweak scale. We ou...

It is pointed out that K condensation in high density matter gives rise to an extremely light Goldstone boson whose mass comes entirely from weak interactions. This implies the existence of metastable non-topological domain walls with a long lifetime. We comment on the mass of the superfluid mode if baryon number is violated. Typeset using REVTEX email: [email protected]

We discuss a realistic supersymmetric SU(6) grand unified theory with the GUT flat direction being lifted by soft supersymmetry breaking, and the doublet-triplet splitting being achieved with Higgs as a pseudo-Goldstone boson. The theory offers a simple solution to the false vacuum and monopole

The Coleman-Weinberg mechanism can realise different phases of dynamical symmetry breaking. In each phase a combination scalars, corresponding to the pseudo-Goldstone boson scale invariance, has loop-suppressed mass. We show that additional beyond bosons, become light at critical points in parameter space where two co-exist. present minimal implementation multi-scalar models, detailing how mass...

In a supersymmetric theory with a spontaneously broken global symmetry, G, if the scale of supersymmetry breaking, M s is smaller than the scale M G of the global symmetry, the Nambu-Goldstone boson, χ is accompanied by two massive superpartners (a fermionic, Ψ χ and a scalar boson, σ χ) with mass of order M s. Cosmological considerations imply stringent constraints on the couplings of Ψ χ and ...

We discuss and estimate the contributions of the new particles predicted by topcolor assisted technicolor(TC2) models to the muon anomalous magnetic moment aμ. Our results show that the contributions of Pseudo Goldstone bosons are very small which can be safely ignored. The main contributions come from the ETC gauge boson xμ and topcolor gauge boson Z ′. If we demand that the mass of Z ′ is con...

A theory of gravity is deduced from the axioms premetric program. The starting point conservation energy and momenta, equivalence gravitation inertia. latter what leads to framework so-called purified gravity. local linear constitutive relation has 14 components when it assumed be metrical, but compatibility with an action principle fixes uniquely coincident general relativity. formalism a dire...