Couplings in pseudosupersymmetry

Quadratic pseudosupersymmetry in two-level systems

Using the intertwining relation we construct a pseudosuperpartner for a (non-Hermitian) Diraclike Hamiltonian describing a two-level system interacting in the rotating wave approximation with the electric component of an electromagnetic field. The two pseudosuperpartners and pseudosupersymmetry generators close a quadratic pseudosuperalgebra. A class of time dependent electric fields for which ...

Bπ Couplings in Qcd

We calculate the D∗Dπ and B∗Bπ couplings using QCD sum rules on the lightcone. In this approach, the large-distance dynamics is incorporated in a set of pion wave functions. We take into account two-particle and three-particle wave functions of twist 2, 3 and 4. The resulting values of the coupling constants are gD∗Dπ = 12.5 ± 1 and gB∗Bπ = 29± 3. From this we predict the partial width Γ(D∗+ → ...

Couplings in Pseudo-Supersymmetry

We analyze theories in which a supersymmetric sector is coupled to a supersymmetrybreaking sector described by a non-linear realization. We show how to consistently couple N = 1 supersymmetric matter to non-supersymmetric matter in such a way that all interactions are invariant under non-linear supersymmetry transformations. We extend this formalism to couple N = 2 supersymmetric matter to N = ...

Loose Couplings

Advances in Gas Turbine Couplings

Over the last 50 years industrial gas turbines have advanced significantly. Horsepower has increased 200 percent (and even higher) within the same envelope. Improvements in efficiencies and reliability (more operating time before overhauls) are being made more often. What took 15 years to change 30 years ago, now, in the last 15 years, happens in five years or less. There are constant demands f...