We present finite energy analytic monopole and dyon solutions whose size is fixed by the electroweak scale. We discuss two types of solutions. The first type is obtained by regularizing the recent solutions of Cho and Maison by modifying the coupling strength of the quartic self-interaction of W -boson in WeinbergSalam model. The second is obtained by enlarging the gauge group SU(2)×U(1) to SU(...

We analyze the one loop corrections to hadronic Z decays in an R–parity violating extension to the Minimal Supersymmetric Standard Model (MSSM). Performing a global fit to all the hadronic observables at the Z–peak, we obtain stringent constraints on the R–violating coupling constants λ and λ. As a result of the strong constraints from the b asymmetry parameters Ab and AFB(b), we find that the ...

Abstract. The Nijmegen Unitarized Meson Model and its application to scalar mesons is briefly revisited. It is shown that all scalar states up to 1.5 GeV can be described as 3P0 qq̄ states coupled to the OZI-allowed open and closed two-meson channels consisting of pseudoscalar and vector mesons. Crucial are the manifestation of a resonancedoubling phenomenon, typical for strong S-wave decay, and...

We have found a successful model of chaotic inflation with an inflaton coupled nonminimally with gravity. The nonminimal coupling constant ξ runs with the evolution of the inflaton. The running nature of the coupling leads naturally to the situations where the coupling becomes small enough to have sufficient period of the inflation to resolve the cosmological puzzles.

We prove that the 1/Nc corrections to the baryon axial current matrix elements are proportional to their lowest order values. This implies that the first correction to axial current coupling constant ratios vanishes, and that the SU(2Nf ) spin-flavor symmetry relations are only violated at second order in 1/Nc. UCSD/PTH 93-18 hep-ph/9307242 July 1993

Two-dimensional sigma models in curved target spaces are considered in which a relationship between the warp factor and the dilaton is imposed in a renormalization group invariant way.

The high hadronic event statistics collected at the Z energy (LEP I) allowed a good understanding of the QCD dynamics. The coupling constant s has been measured with several methods giving a global average s (M Z) = 0:122 0:004. The avour independence of s has been tested obtaining b s == udsc s = 0:997 0:023. Quark-gluon jet diierencies has been observed among which < n > gluon = < n > quark =...

The strong coupling constant αS can be measured in deep inelastic ep scattering by employing various methods. Recent results on the extraction of αS using jet and event shape observables are presented. The results are found to be in good agreement with other more inclusive measurements and the world average value.

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...