We consider the renormalisation group flow of gauge couplings within the so-called exceptional supersymmetric standard model (E 6 SSM) based on the low energy matter content of 27 dimensional representations of the gauge group E 6 , together with two additional non-Higgs doublets. The two–loop beta functions are computed, and the threshold corrections are… (More)
The Higgs boson spectrum of the Next-to-Minimal Supersymmetric Standard Model is examined. The model includes a singlet Higgs field S in addition to the two Higgs doublets of the minimal extension. 'Natural' values of the parameters of the model are motivated by their renormalization group running and the vacuum stability. The qualitative features of the… (More)
INTRODUCTION Several blood tests are performed uniformly in patients hospitalized with acute decompensated heart failure and are predictive of the outcomes: complete blood count, electrolytes, renal function, glucose, albumin and uric acid. We sought to evaluate the relationship between routine admission laboratory tests results, patient characteristics and… (More)
We discuss some phenomenological aspects of an E 6 inspired supersymmetric standard model with an extra U (1) N gauge symmetry under which right-handed neutri-nos have zero charge, allowing a conventional seesaw mechanism. The µ problem is solved in a similar way to the NMSSM, but without the accompanying problems of singlet tadpoles or domain walls. The… (More)
According to the multiple point principle, Nature adjusts coupling parameters so that many vacuum states exist and each has approximately zero vacuum energy density. We apply this principle to the general two-Higgs doublet extension of the Standard Model, by requiring the existence of a large set of degenerate vacua at an energy scale much higher than the… (More)
The present talk is based on the assumption that New Bound States (NBSs) of top-anti-top quarks (named T-balls) exist in the Standard Model (SM): a) there exists the scalar 1S–bound state of 6t + 6 ¯ t — the bound state of 6 top-quarks with their 6 anti-top-quarks; b) the forces which bind these top-quarks are very strong and almost completely compensate… (More)
We review symmetries protecting a zero value for the cosmological constant in no–scale supergravity and reveal the connection between the Multiple Point Principle, no–scale and superstring inspired models .
We calculate flavour dependent lepton asymmetries within the E 6 inspired Super-symmetric Standard Model (E 6 SSM), which has an extra U (1) N symmetry. In this model, the right-handed neutrino doesn't participate in gauge interactions, allowing it to be used for both the see–saw mechanism and leptogenesis. Extra Higgs, leptons and leptoquarks predicted by… (More)
The tiny order of magnitude of the cosmological constant is sought to be explained in a model involving the following ingredients: supersymmetry breaking in N=1 supergravity and the multiple point principle. We demonstrate the viability of this scenario in the minimal SUGRA model.
We study the neutralino sector of the Minimal Non-minimal Supersymmetric Standard Model (MNSSM) where the µ problem of the Minimal Supersymmetric Standard Model (MSSM) is solved without accompanying problems related with the appearance of domain walls. In the MNSSM as in the MSSM the lightest neutralino can be the absolutely stable lightest supersymmetric… (More)