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11 papers · 1 filter
The b -> s gamma decay in supergravity with radiatively electroweak breaking
Marco Aurelio Diaz
It is analyzed the branching ratio in the context of minimal supergravity with radiatively broken electroweak symmetry group. There is a strong dependenc…
Superconductivity in the Cuo Hubbard Model with Long-Range Coulomb Repulsion
Jose Riera, Elbio Dagotto
A multiband CuO Hubbard model is studied which incorporates long-range (LR) repulsive Coulomb interactions. In the atomic limit, it is shown that a charge-transfer from copper to o…
Moments of Dirichlet splines and their applications to hypergeometric functions
Edward Neuman, Patrick J. Van Fleet
Dirichlet averages of multivariate functions are employed for a derivation of basic recurrence formulas for the moments of multivariate Dirichlet splines. An algorithm for computin…
Superconductivity Near Phase Separation in Models of Correlated Electrons
E. Dagotto, J. Riera, Y. C. Chen +4
Numerical and analytical studies of several models of correlated electrons are discussed. Based on exact diagonalization and variational Monte Carlo techniques, we have found stron…
Phase separation and pairing in coupled chains and planes
Jose A. Riera
A generalization of the model in a system of two coupled chains or planes is studied by numerical diagonalization of small clusters. In particular, the effect of density fluc…
Cluster diagonalization in systematically expanded Hilbert spaces: application to models of correlated electrons
Jose' Riera, Elbio Dagotto
A method of cluster diagonalization in a systematically expanded Hilbert space is described. We discuss some applications of this procedure to models of high-T_c superconductors, l…
Effective Potential of a Black Hole in Thermal Equilibrium with Quantum Fields
David Hochberg, Thomas W. Kephart, James W. York
Expectation values of one-loop renormalized thermal equilibrium stress-energy tensors of free conformal scalars, spin- fermions and U(1) gauge fields on a Schwarzschil…
Constraints on Supersymmetry due to b -> s γ: an Improved Calculation
Marco A. Diaz
The calculation of the one-loop induced decay rate b -> s γis improved by including radiative corrections to the charged Higgs mass and to the charged-Higgs-fermion-fermion vertex.…
Electroweak Corrections to the Supersymmetric Charged Higgs Fermionic Decay
Marco A. Diaz
One-loop radiative corrections to the charged Higgs coupling to two fermions and to the charged Higgs fermionic decay are studied. A renormalization scheme is proposed including th…
Higgs-Boson Decay to Four Fermions Including a Single Top Quark Below Threshold
Heath Pois, Thomas J. Weiler, Tzu Chiang Yuan
The rare decay modes Higgs four light fermions, and Higgs single top-quark + three light fermions for , are presented, and phenomenologica…
Relativistic Ring-Diagram Nuclear Matter Calculations
M. F. Jiang, R. Machleidt, T. T. S. Kuo
A relativistic extension of the particle-particle hole-hole ring-diagram many-body formalism is developed by using the Dirac equation for single-particle motion in the medium. Appl…