Simulations in the 2e-regime of chiral perturbation theory
Por:
Nagai K.-I., Bietenholz W., Chiarappa T., Jansen K., Shcheredin S.
Publicada:
1 ene 2004
Resumen:
We discuss the potential of Ginsparg-Wilson fermion simulations in the ?-regime of chiral perturbation theory, regarding the determination of the leading low energy constants of the effective chiral Lagrangian. It turns out to be very hard to measure observables in the topologically trivial sector. There a huge statistics would be required, due to the frequent occurrence of very small eigenvalues. Moreover, contact with chiral perturbation theory is only established if the physical volume of the system is sufficiently large. © 2004 Elsevier B.V. All rights reserved.