We discuss the improvement of local four-fermion operators and we present the one-loop perturbative calculation of their renormalization constants and mixing coefficients in the theory defined by a nearest-neighbour improved lattice action. This calculation is a necessary ingredient for improved Monte Carlo computations of hadronic matrix elements relevant for weak interactions.
Frezzotti, R., Gabrielli, E., Pittori, C., Rossi, G. (1992). Four-fermion operators with improved nearest-neighbour action. NUCLEAR PHYSICS. B, 373(3), 781-794 [doi:10.1016/0550-3213(92)90276-H].
Four-fermion operators with improved nearest-neighbour action
FREZZOTTI, ROBERTO;ROSSI, GIANCARLO
1992-01-01
Abstract
We discuss the improvement of local four-fermion operators and we present the one-loop perturbative calculation of their renormalization constants and mixing coefficients in the theory defined by a nearest-neighbour improved lattice action. This calculation is a necessary ingredient for improved Monte Carlo computations of hadronic matrix elements relevant for weak interactions.File in questo prodotto:
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