A local formulation of lattice QCD without unphysical fermion zero modes

Roberto Frezzotti; Pietro Antonio Grassi; Stefan Sint; Peter Weisz

doi:10.1016/s0920-5632(00)91852-8

A local formulation of lattice QCD without unphysical fermion zero modes

Roberto Frezzotti
, Pietro Antonio Grassi
, Stefan Sint
, Peter Weisz

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

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 N_f = 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.

Lingua originale	Inglese
pagine (da-a)	941-946
Numero di pagine	6
Rivista	Nuclear Physics B - Proceedings Supplements
Volume	83-84
Numero di pubblicazione	1-3
DOI	https://doi.org/10.1016/s0920-5632(00)91852-8
Stato di pubblicazione	Pubblicato - mar 2000
Pubblicato esternamente	Sì

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10.1016/s0920-5632(00)91852-8

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abstract = "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 i{\=ψ}γ5τ3ψ 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.",

author = "Roberto Frezzotti and Grassi, \{Pietro Antonio\} and Stefan Sint and Peter Weisz",

note = "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.",

year = "2000",

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AU - Grassi, Pietro Antonio

AU - Sint, Stefan

AU - Weisz, Peter

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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.

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JO - Nuclear Physics B - Proceedings Supplements

JF - Nuclear Physics B - Proceedings Supplements

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ER -

A local formulation of lattice QCD without unphysical fermion zero modes

Abstract

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