2019 Impact factor 4.389
Particles and Fields
Eur. Phys. J. C 10, 347-356
DOI 10.1007/s100529900085

The supersymmetric-flavor problem for heavy first-two-generation scalars at next-to-leading order

R. Contino - I. Scimemi

Dipartimento di Fisica, Università degli Studi di Roma "La Sapienza" and
INFN, Sezione di Roma, P.le A. Moro 2, I-00185 Roma, Italy

Received: 18 September 1998 / Revised version: 5 January 1999 / Published online: 3 August 1999

Abstract
We analyze in detail the constraints on SUSY-model parameters obtained from K-$\overline{K}$ mixing in the hypothesis of a splitted SUSY spectrum. FCNC contributions from gluino-squark-quark interactions are studied in the so-called mass-insertion approximation. We present boundaries on mass insertions and on SUSY mass scales. We improve on previous results by including the NLO-QCD corrections to the $\Delta S=2$ effective Hamiltonian and the complete set of B parameters for the evaluation of hadronic matrix elements. A full set of magic numbers that can be used for further analyses of these models is also given. We find that the inclusion of NLO-QCD corrections and the B parameters change the results obtained at LO and in the vacuum insertion approximation by an amount of about 25-35%.


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