2 research outputs found
Constraints on Phases of Supersymmetric Flavour Conserving Couplings
In the unconstrained MSSM, we reanalyze the constraints on the phases of
supersymmetric flavour conserving couplings that follow from the electron and
neutron electric dipole moments (EDM). We find that the constraints become weak
if at least one exchanged superpartner mass is >O(1 TeV) or if we accept large
cancellations among different contributions. However, such cancellations have
no evident underlying symmetry principle. For light superpartners, models with
small phases look like the easiest solution to the experimental EDM
constraints. This conclusion becomes stronger the larger is the value of
. We discuss also the dependence of , and
decay on those phases.Comment: 38 pages, 22 figures, uses epsfig.sty, axodraw.sty (not included);
error in sign of gluino contribution to EDM of u and d quarks and few figures
corrected, important conclusions unchange
Chargino searches at LEP for complex MSSM parameters
We reanalyze the results of the chargino searches at LEP (on the basis of the
DELPHI 189 GeV data sample), including the possibility of complex MSSM
parameters. We point out the possible differences between the complex- and
real-parameter analysis. We check that the regions excluded by ``standard''
analyses remain generally robust against the introduction of complex
parameters, with the exception of light sneutrino and low scenario,
where additional constraints like those given by the width or electric
dipole moment measurements are necessary.Comment: 27 pages, 16 figures, uses axodraw.st