Showing papers by "Kai Puolamäki published in 1998"
TL;DR: In this article, an upper bound on the tree-level mass of the lightest Higgs boson in naturally R-parity conserving supersymmetric left-right models was obtained.
16 citations
TL;DR: In this paper, the authors obtained upper limits on tan β in generalized supersymmetric SU (5) grand unified theories with gauge-mediated supersymmetry breaking, showing that the predicted values of tan β are mostly inconsistent with the constraints from nucleon decay.
8 citations
TL;DR: In this article, the authors obtained upper limits on tan beta in generalized supersymmetric SU(5) grand unified theories with gauge-mediated supersymmetry breaking, showing that the predicted values of tan beta are mostly inconsistent with the constraints from nucleon decay.
Abstract: By considering the constraints from nucleon decay we obtain upper limits on tan beta in generalized supersymmetric SU(5) grand unified theories with gauge-mediated supersymmetry breaking. We find that the predicted values of tan beta in these models are mostly inconsistent with the constraints from nucleon decay.
4 citations
TL;DR: In this article, the authors studied a class of generalized models of gauge mediated supersymmetry breaking (GMSB) and found the parameters and the full particle spectrum of the minimal supersymmetric standard model for all GMSB models with messenger multiplicities that satisfy the perturbativity of the gauge couplings up to the GUT scale.
Abstract: We study a class of generalized models of gauge mediated supersymmetry breaking (GMSB). We find the parameters and the full particle spectrum of the minimal supersymmetric standard model (MSSM) for all GMSB models with messenger multiplicities that satisfy the perturbativity of the gauge couplings up to the GUT scale. We give a detailed description of the algorithm that has been used to predict all the unmeasured parameters of the MSSM by taking (one-loop) radiative effects into account. We also calculate the branching ratio $BR(b \to s \gamma)$ and find that it always turns out to be larger than the standard model prediction. However, we find that the branching ratio typically remains within the current experimental bounds, except for some special cases with a light charged Higgs boson, or a small supersymmetry breaking scale and a negative $\mu$-parameter.
2 citations
TL;DR: In this paper, the neutral meson mixings are used to bound one nonzero product of two lambda-type couplings and working in two different bases for the left-handed quark superfields.
Abstract: Assuming one nonzero product of two $\lambda'$-type couplings and working in two different bases for the left-handed quark superfields, the neutral meson mixings are used to bound these products. We emphasize the strong basis dependence of the bounds: in one basis many products contribute to neutral meson mixings at tree level, while in the other these products except one contribute at 1-loop level only and the GIM mechanism takes place. Correspondingly, these bounds differ between bases by orders of magnitudes.
1 citations