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Matrix Elements without Quark Masses on the Lattice | | A. Donini
; V. Gimenez
; L. Giusti
; G. Martinelli
; | | Date: |
7 Sep 1999 | | Journal: | Nucl.Phys.Proc.Suppl. 83 (2000) 238-240 | | Subject: | hep-lat | | Abstract: | We introduce a new parameterization of four-fermion matrix elements which does not involve quark masses and thus allows a reduction of systematic uncertainties in physical amplitudes. As a result the apparent quadratic dependence of e’/e on m_s is removed. To simplify the matching between lattice and continuum renormalization schemes, we express our results in terms of Renormalization Group Invariant B-parameters which are renormalization-scheme and scale independent. As an application of our proposal, matrix elements of DeltaI=3/2 and SUSY DeltaF=2 ($F=S,C,B$) four-fermion operators have been computed. | | Source: | arXiv, hep-lat/9909041 | | Services: | Forum | Review | PDF | Favorites | |
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