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We present a detailed description of N = 2 stationary BPS multicenter black hole solutions for quadratic prepotentials with an arbitrary number of centers and scalar fields making a systematic use of the algebraic properties of the matrix of second derivatives of the prepotential, S, which in this case is a scalar-independent matrix. The anti-involution matrix S can be understood as a Freudenthal duality x = Sx. We show that this duality can be generalized to "Freudenthal transformations" x → λ exp(θS)x = ax + bx under which the horizon area, ADM mass and intercenter distances scale up leaving constant the scalars at the fixed points. In the special case λ = 1, "S-rotations", the transformations leave invariant the solution. The standard Freudenthal duality can be written as x = exp(пπ/2 S)x. We argue that these generalized transformations leave invariant not only the quadratic prepotential theories but also the general stringy extremal quartic form Δ4, Δ4(x) = Δ4(cos θx + sin θ x) and therefore its entropy at lowest order. [ABSTRACT FROM AUTHOR]

On the light of the recent LHC boson discovery, we present a phenomenological evaluation of the ratio ρt = mZmt/mH², from the LHC combined mH value, we get ((1σ)) ρt(exp) t = 0.9956 ± 0.0081. = 0.9956 ± 0.0081. [ABSTRACT FROM AUTHOR]

We present a short review of the existing evidence in favor of neutrino mass and neutrino oscillations which come from different kinds of experiments. We focus our attention in particular on solar neutrinos, presenting a review of some recent analysis of all available neutrino oscillation evidence in Solar experiments including the recent SNO CC and NC data. We present in detail the power of the reactor experiment KamLAND for discriminating existing solutions to the SNP and giving accurate information on neutrino masses and mixing angles. © 2003 American Institute of Physics [ABSTRACT FROM AUTHOR]