Abstract
AbstractWe derive chiral Ward identities for lattice QCD with Wilson quarks and $$N_{\mathrm{f}}\ge 3$$Nf≥3 flavours, on small lattices with Schrödinger functional boundary conditions and vanishingly small quark masses. These identities relate the axial variation of the non-singlet pseudoscalar density to the scalar one, thus enabling the non-perturbative determination of the scale-independent ratio $$Z_{\mathrm {S}}/Z_{\mathrm {P}}$$ZS/ZP of the renormalisation parameters of these operators. We obtain results for $$N_{\mathrm{f}}=3$$Nf=3 QCD with tree-level Symanzik-improved gluons and Wilson-Clover quarks, for bare gauge couplings which cover the typical range of large-volume $$N_{\mathrm{f}}= 2+1$$Nf=2+1 simulations with Wilson fermions at lattice spacings below $$0.1\,$$0.1fm. The precision of our results varies from 0.3 to 1%, except for the coarsest lattice, where it is 2%. We discuss how the $$Z_{\mathrm {S}}/Z_{\mathrm {P}}$$ZS/ZP ratio can be used in the non-perturbative calculations of $${\mathrm {O}}(a)$$O(a) improved renormalised quark masses.
Funder
Deutsche Forschungsgemeinschaft
Publisher
Springer Science and Business Media LLC
Subject
Physics and Astronomy (miscellaneous),Engineering (miscellaneous)
Reference47 articles.
1. M. Lüscher, Advanced lattice QCD, Proceedings, Summer School in Theoretical Physics, Les Houches. arXiv: hep-lat/9802029
2. M. Lüscher, S. Sint, R. Sommer, P. Weisz, Chiral symmetry and $${\rm O}(a)$$ improvement in lattice QCD. Nucl. Phys. B 478, 365 (1996). [arXiv: hep-lat/9605038]
3. M. Bochicchio, L. Maiani, G. Martinelli, G.C. Rossi, M. Testa, Chiral Symmetry on the Lattice with Wilson Fermions. Nucl. Phys. B 262, 331 (1985)
4. A. Vladikas, Three Topics in Renormalization and Improvement, Proceedings, Summer School in Theoretical Physics, Les Houches. arXiv: 1103.1323
5. L. Maiani, G. Martinelli, M.L. Paciello, B. Taglienti, Scalar densities and baryon mass differences in lattice QCD wth Wilson fermions. Nucl. Phys. B 293, 420 (1987)
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