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Nonlinear Realization of Chiral Symmetry on the Lattice | | S. Chandrasekharan
; M. Pepe
; F. D. Steffen
; U.-J. Wiese
; | | Date: |
16 Jun 2003 | | Journal: | JHEP 0312 (2003) 035 | | Subject: | hep-lat hep-ph nucl-th | | Affiliation: | Duke U.), M. Pepe (Bern U.), F. D. Steffen (Bern U.), and U.-J. Wiese (Bern U. and MIT | | Abstract: | We formulate lattice theories in which chiral symmetry is realized nonlinearly on the fermion fields. In this framework the fermion mass term does not break chiral symmetry. This property allows us to use the Wilson term to remove the doubler fermions while maintaining exact chiral symmetry on the lattice. Our lattice formulation enables us to address non-perturbative questions in effective field theories of baryons interacting with pions and in models involving constituent quarks interacting with pions and gluons. We show that a system containing a non-zero density of static baryons interacting with pions can be studied on the lattice without encountering complex action problems. In our formulation one can also decide non-perturbatively if the chiral quark model of Georgi and Manohar provides an appropriate low-energy description of QCD. If so, one could understand why the non-relativistic quark model works. | | Source: | arXiv, hep-lat/0306020 | | Services: | Forum | Review | PDF | Favorites | |
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