On the chiral limit in lattice gauge theories with Wilson fermions
| dc.creator | Hoferichter, A. | |
| dc.creator | Mitrjushkin, V. K. | |
| dc.creator | Müller--Preussker, M. | |
| dc.date | 1995-06-02 | |
| dc.date | 1996-07-05 | |
| dc.date.accessioned | 2026-07-07T08:59:42Z | |
| dc.date.available | 2026-07-07T08:59:42Z | |
| dc.description | The chiral limit $~κ\simeq κ_c(β)~$ in lattice gauge theories with Wilson fermions and problems related to near--to--zero ('exceptional') eigenvalues of the fermionic matrix are studied. For this purpose we employ compact lattice QED in the confinement phase. A new estimator $~\mpr_π~$ for the calculation of the pseudoscalar mass $~m_π~$ is proposed which does not suffer from 'divergent' contributions at $κ\simeq κ_c(β)$. We conclude that the main contribution to the pion mass comes from larger modes, and 'exceptional' eigenvalues play {\it no} physical role. The behaviour of the subtracted chiral condensate $~\langle \psb ψ\rangle_{subt}~$ near $~κ_c(β)~$ is determined. We observe a comparatively large value of $~\langle \psb ψ\rangle_{subt} \cdot Z_P^{-1}~$, which could be interpreted as a possible effect of the quenched approximation. | |
| dc.description | EXTENDED version. To be published in Z.f.Physik C | |
| dc.identifier | https://arxiv.org/abs/hep-lat/9506006 | |
| dc.identifier | http://arxiv.org/abs/hep-lat/9506006 | |
| dc.identifier | Z.Phys. C74 (1997) 541-548 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/147809 | |
| dc.subject | High Energy Physics - Lattice | |
| dc.title | On the chiral limit in lattice gauge theories with Wilson fermions | |
| dc.type | text |