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HK: Hadronen und Kerne

HK 68: Structure of Baryons, Mesons X, Theory

HK 68.5: Vortrag

Donnerstag, 19. März 1998, 15:45–16:00, J

An Effective Δ S=1 Weak Chiral Lagrangian from the Chiral Quark Model — •M. Franz¹, H.-C. Kim¹, M.V. Polyakov^2,1, and K. Goeke¹ — ¹Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum — ²Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg 188350, Russia

Starting from the effective weak quark Hamiltonian, we have derived the effective Δ S=1 weak chiral Lagrangian up to O(p⁴) in the momentum expansion within the framework of the chiral quark model. The chiral low energy coefficients (LEC) appearing in chiral perturbation theory are then determined in terms of the scale-dependent Wilson coefficients of the corresponding operators, the pion decay constant, the quark condensate and the constituent quark mass.