Fermion masses and the extended technicolor scale

We show how the use of the so called irregular solution for the fermionic self-energy, enables to raise the extended technicolor mass scale, avoiding the problems of flavor changing neutral currents in dynamically broken gauge theories.     

On mass matrices in extended technicolor theories

General properties of mass matrices in extended technicolor models are investigated. The question of hermitean quark mass matrices in both charge sectors is addressed. A new class of models using non-conjugate, inequivalent representations is also considered. Mass matrices in such models need not have specific symmetry properties. Only one model in this class is asymptotically free.     

Universally coupled extraZ bosons from extended technicolor models

We show that in extended technicolor models there are several neutralZ bosons whose couplings to fermions are independent of family. TheseZ bosons are therefore additional to that of the standard model and induce corrections to the low energy effective Hamiltonian. These corrections are calculated in the most general model which includes technileptons (introduced to give mass to leptons).     

Effective Lagrangian Theory

From view point of modem field theory, all theories for realistic interaction are effective, which come from some more elementary theory. One main feature of effective theory is that it include infinite number of interaction terms. Effective theory is different with standard renormalizable field theory. Here, we focus on a class of special effective theory-effective chiral Lagrangian in strong interaction, discuss its features and present status of its development. We don't involve heavy quark effechvefield theory and N'RQCD and the combinahon of these theories and effective chiral Lagrangian.     

有效拉氏量理论

按照现代场论观点,所有现在所用的描述现实相互作用的理论都是某种更基本的理论的有效理论,有效理论的一个主要特点是其相互作用项一般是无穷多项.它与通常的可重整场论有很大差别.这里主要讨论一类特殊的有效理论——强作用手征有效拉氏量的理论特点及研究现状.没有涉及强作用中重夸克有效场论理论,NRQCD理论及它们与手征有效拉氏量结合而形成的理论.     

Effective Lagrangian for quantum black holes

We discuss the most general effective Lagrangian obtained from the assumption that the degrees of freedom to be quantized, in a black hole, are on the horizon. The effective Lagrangian depends only on the induced metric and the extrinsic curvature of the (fluctuating) horizon, and the possible operators can be arranged in an expansion in powers of M_P1/M, where M_P1 is the Planck mass and M the black hole mass. We perform a semiclassical expansion of the action with a formalism which preserves general covariance explicitly. Quantum fluctuations over the classical solutions are described by a single scalar field living in the (2 + 1)-dimensional world-volume swept by the horizon, with a given coupling to the background geometry. We discuss the resulting field theory and we compute the black hole entropy with our formalism.     

Effective low energy Lagrangian for QCD

The peculiar collective excitations of gluons, related to the Lorentz transformations of the conjugate field tensor, were proposed in a previous paper. The pseudoscalar mesons are related in the same way to the chiral transformations of quarks. We discuss these relations, including the U (1) problem, and derive the low energy effective Lagrangian for all these collective excitations. This Lagrangian contains the potential for the U (1) field due to axial anomalies.