Phys. Rev. D 66, 093005 (2002) [23 pages]Flavor changing Z decays from scalar interactions at a giga-Z linear colliderReceived 22 March 2002; published 18 November 2002 The flavor changing decay Z⃗dIdJ is investigated with special emphasis on the bs̅ final state. Various models for flavor violation are considered: two Higgs doublet models (2HDM’s), supersymmetry (SUSY) with flavor violation in the up- and down-type squark mass matrices and SUSY with flavor violation mediated by R-parity-violating interaction. We find that, within the SUSY scenarios for flavor violation, the branching ratio for the decay Z⃗bs̅ can reach 10-6 for large tanβ values, while the typical size for this branching ratio in the 2HDM’s considered is about two orders of magnitude smaller at best. Thus, flavor changing SUSY signatures in radiative Z decays such as Z⃗bs̅ may be accessible to future “Z factories” such as a giga-Z version of the DESY TESLA design. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.66.093005
DOI:
10.1103/PhysRevD.66.093005
PACS:
13.38.-b, 12.60.Jv, 14.70.-e
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