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- W2074724557 abstract "A formulation of the fermion action is discussed which includes an explicit four momentum boost on the field prior to discretisation. This is used to shift the zero of lattice momentum to lie near one of the on-shell quark poles. The positive pole is selected if we wish to describe a valence quark, and negative pole for a valence antiquark. Like NRQCD, the typical lattice momenta involved in hadronic correlation functions can be kept small: of order O(αΛQCD), rather than O(amQ) even when describing heavy quarks. If we expand around the particle pole, the anti-particle correlator will be poorly described for large amQ. However, in that case the anti-particle will be far off shell and will only affect unphysical, renormalization factors. The formulation produces the correct continuum limit, and preliminary results have been obtained (for an unimproved action) of both the one-loop self energy and a non-perturbative correlation function." @default.
- W2074724557 created "2016-06-24" @default.
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- W2074724557 date "2004-03-01" @default.
- W2074724557 modified "2023-09-26" @default.
- W2074724557 title "Four-momentum boosted fermion fields" @default.
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- W2074724557 doi "https://doi.org/10.1016/s0920-5632(03)02581-7" @default.
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