Remarks on the hadronic matrix elements relevant to the SUSY K-Kbar mixing amplitude

Details Remarks on the hadronic matrix elements relevant to the SUSY K-Kbar mixing amplitude Remarks on the hadronic matrix elements relevant to the SUSY K-Kbar mixing amplitude

2004-08-18

arxiv.org/abs/hep-lat/0408029v2

Phys.Rev. D70 (2004) 094036

Physics

High Energy Physics

High Energy Physics - Lattice

13 pages, 3 figures [added 1 reference and a discussion about the impact of the NNLO chiral corrections to the "golden ratios"

Scientific paper

10.1103/PhysRevD.70.094036

We compute the 1-loop chiral corrections to the bag parameters which are needed for the discussion of the SUSY K-Kbar mixing problem in both finite and infinite volume. We then show how the bag parameters can be combined among themselves and with some auxiliary quantities and thus sensibly reduce the systematic errors due to chiral extrapolations as well as those due to finite volume artefacts present in the results obtained from lattice QCD. We also show that in some cases these advantages remain as such even after including the 2-loop chiral corrections. Similar discussion is also made for the K --> pi electro-weak penguin operators.

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