Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8192272 | Physics Letters B | 2011 | 4 Pages |
Abstract
In the context of the Supersymmetric Standard Model with hierarchical sfermion masses, we re-analyze the QCD corrections to ÎF=2 effective Hamiltonian properly including effects which have been neglected so far. The point is that some ÎF=2 diagrams, involving both the heavy and the light sparticles, exhibit a logarithmic dependence on the ratio between the two masses, signalling a sensitivity to all the momenta between the two scales. In order to properly deal with these terms one has to take into account the mixing between ÎF=1 and ÎF=2 operators. In typical situations this treatment can affect the result at the level of 30% or even more.
Keywords
Related Topics
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Authors
Enrico Bertuzzo, Marco Farina, Paolo Lodone,