On the QCD corrections to Delta F=2 FCNC in the Supersymmetric SM with hierarchical squark masses

Details On the QCD corrections to Delta F=2 FCNC in the Supersymmetric SM with hierarchical squark masses On the QCD corrections to Delta F=2 FCNC in the Supersymmetric SM with hierarchical squark masses

2010-11-14

arxiv.org/abs/1011.3240v2

Physics Letters B 699 (2011) 98-101

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 1 figure. v2: Conforms to version accepted for publication on Phys Lett B

Scientific paper

10.1016/j.physletb.2011.03.062

In the context of the Supersymmetric Standard Model with hierarchical sfermion masses, we re-analyze the QCD corrections to Delta F=2 effective Hamiltonian properly including effects which have been neglected so far. The point is that some Delta F=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 Delta F=1 and Delta F=2 operators. In typical situations this treatment can affect the result at the level of 30% or even more.

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