Valley method versus instanton-induced effective lagrangian up to

A New Valley Method for Instanton Deformation*

Instanton and anti-instanton configurations used in evaluating the baryon and lepton number violation process in the standard model are investigated. Although not solutions of the field equations, such configurations play a crucial role in evaluating the relevant amplitudes. The streamline method, which has been employed for this purpose, is examined. A new method that has better features than ...

Level-Crossing in the Instanton-Anti-Instanton Valley

We study the level crossing of the fermion system described by the euclidean Dirac Hamiltonian in the valley background. One chiral fermion level is shown to cross twice the zero value in the case of well-separated instanton-antiinstanton background. Below a critical separation, however, level crossings are absent. The phenomenon can be interpreted as the transition to a gauge field configurati...

Effective Lagrangian induced by the anomalous

The effective Lagrangian induced by the anomalous

Effective chiral lagrangian in the chiral limit from the instanton vacuum

Department of Physics, Pusan National University, 609-735 Busan, Republic of Korea (Dated: August 2003) Abstract We study the effective chiral Lagrangian in the chiral limit from the instanton vacuum. Starting from the nonlocal effective chiral action, we derive the effective chiral Lagrangian, using the derivative expansion to order O(p4) in the chiral limit. The low energy constants, L1, L2, ...