5 research outputs found
CP violation in chargino decays in the MSSM
In the minimal supersymmetric standard model (MSSM) with complex parameters,
supersymmetric loop effects can lead to \emph{CP} violation. We calculate the
rate asymmetries of decays of charginos into the lightest neutralino and a
boson on the basis of the most important loop contributions in the third
generation squark sectors. It turns out that the \emph{CP} violating
asymmetries can be a few per cent in typical regions of the parameter space of
the MSSM. These processes would provide very promising channels for probing
\emph{CP} violation in the MSSM at future high-energy colliders.Comment: 15 pages, 5 figures, LaTeX2
Removing Discrete Ambiguities in CP Asymmetry Measurements
We discuss methods to resolve the ambiguities in CP violating phase angles
that are left when a measurement of is made. We show what
knowledge of hadronic quantities will be needed to fully resolve all such
ambiguities.Comment: 23 pages, revtex, no figure
CP Violation in Tau Slepton Pair Production at Muon Colliders
We discuss in detail signals for CP violation in the Higgs boson and
tau-slepton sectors through the production processes , where label the two
slepton mass eigenstates in the minimal supersymmetric standard model. We
assume that the soft breaking parameters of third generation sfermions contain
CP violating phases, which induce CP violation in the Higgs sector through
quantum corrections. We classify all the observables for probing CP violation
in the Higgs boson and slepton sectors. These observables depend on the
initial muon beam polarization, where we include transverse polarization
states. If the heavy Higgs bosons can decay into tau slepton pairs, a complete
determination of the CP properties of the neutral Higgs boson and
--slepton systems is possible. The interference between the Higgs boson
and gauge boson contributions could also provide a powerful method for probing
CP violation, if transversely polarized muon beams are available. We show in
detail how to directly measure CP violation in the tau slepton system, under
the assumption that the neutral Higgs mixing angles are determined through the
on--shell production of the neutral Higgs bosons.Comment: 38 pages, 9 figures Including 7 eps ones. A figure to show the
dependence on tan(beta) and the mass parameters of the sfermion sectors and a
reference added. To appear in Phys. Rev.
Observing Direct CP Violation in Untagged B-Meson Decays
Direct CP violation can exist in untagged B-meson decays to self-conjugate,
three-particle final states; it would be realized as a population asymmetry in
the untagged decay rate across the mirror line of the Dalitz plot of the
three-body decay. We explore the numerical size of this direct CP-violating
effect in a variety of B-meson decays to three pseudoscalar mesons; we show
that the resulting asymmetry is comparable to the partial rate asymmetry in the
analogous tagged decays, making the search for direct CP violation in the
untagged decay rate, for which greater statistics accrue, advantageous.Comment: 31 pages, REVTeX4, 1 eps figure, references added, typos corrected,
version to appear in PR