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Renormalization group invariant matrix elements of Delta S = 2 and Delta I = 3/2 four fermion operators without quark masses
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Renormalization group invariant matrix elements of Delta S = 2 and Delta I = 3/2 four fermion operators without quark masses
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| dc.contributor.author | Donini, Andrea | |
| dc.contributor.author | Giménez Gómez, Vicente | |
| dc.contributor.author | Giusti, L. | |
| dc.contributor.author | Martinelli, Guido | |
| dc.date.accessioned | 2014-09-26T10:53:11Z | |
| dc.date.available | 2014-09-26T10:53:11Z | |
| dc.date.issued | 1999 | |
| dc.identifier.citation | Donini, Andrea Giménez Gómez, Vicente Giusti, L. Martinelli, G. (1999) Renormalization group invariant matrix elements of Delta S = 2 and Delta I = 3/2 four fermion operators without quark masses Physics Letters B 470 1-4 233 242 | |
| dc.identifier.uri | http://hdl.handle.net/10550/39006 | |
| dc.description.abstract | We introduce a new parameterization of four-fermion operator matrix elements which does not involve quark masses and thus allows a reduction of systematic uncertainties. In order 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 Delta I = 3/2 and SUSY Delta S = 2 operators have been computed. The calculations have been performed using the tree-level improved Clover lattice action at two different values of the strong coupling constant (beta = 6/g(2) = 6.0 and 6,2), in the quenched approximation. Renormalization constants and mixing coefficients of lattice operators have been obtained non-perturbatively. Using lowest order chi PT, we also obtain (pi pi\O-7\K)(I=2)(NDR) = (0.11 +/- 0.02) GeV4 and (pi pi\O-8\K)(I=2)(NDR) = (0.51 +/- 0.05) GeV4 at mu=2 GeV. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Physics Letters B, 1999, vol. 470, num. 1-4, p. 233-242 | |
| dc.subject | Partícules (Física nuclear) | |
| dc.title | Renormalization group invariant matrix elements of Delta S = 2 and Delta I = 3/2 four fermion operators without quark masses | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2014-09-26T10:53:11Z | |
| dc.identifier.doi | 10.1016/S0370-2693(99)01300-3 | |
| dc.identifier.idgrec | 041504 | |
| dc.rights.accessRights | open access | es_ES |
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