TY - JOUR
T1 - A local formulation of lattice QCD without unphysical fermion zero modes
AU - Frezzotti, Roberto
AU - Grassi, Pietro Antonio
AU - Sint, Stefan
AU - Weisz, Peter
N1 - Funding Information:
This work is part of the ALPHA collaboration research programme. We are grateful to M. Liischer for useful suggestions, and to R. Sommer for a critical reading of our notes. S. Sint acknowledges support by the European Commission under grant No. FMBICT972442.
PY - 2000/3
Y1 - 2000/3
N2 - The problem of unphysical zero modes in lattice QCD with Wilson fermions can be solved in a clean way by including a mass term proportional to iψ̄γ5τ3ψ in the standard lattice theory with Nf = 2 mass degenerate Wilson quarks. We argue that up to cutoff effects, this lattice theory is equivalent to standard lattice QCD, for suitable choices of the mass parameters and with a natural re-interpretation of observables. On-shell O(a) improvement can be implemented in a straightforward way.
AB - The problem of unphysical zero modes in lattice QCD with Wilson fermions can be solved in a clean way by including a mass term proportional to iψ̄γ5τ3ψ in the standard lattice theory with Nf = 2 mass degenerate Wilson quarks. We argue that up to cutoff effects, this lattice theory is equivalent to standard lattice QCD, for suitable choices of the mass parameters and with a natural re-interpretation of observables. On-shell O(a) improvement can be implemented in a straightforward way.
UR - https://www.scopus.com/pages/publications/0034147836
U2 - 10.1016/s0920-5632(00)91852-8
DO - 10.1016/s0920-5632(00)91852-8
M3 - Article
AN - SCOPUS:0034147836
SN - 0920-5632
VL - 83-84
SP - 941
EP - 946
JO - Nuclear Physics B - Proceedings Supplements
JF - Nuclear Physics B - Proceedings Supplements
IS - 1-3
ER -