3 research outputs found
Effects of CP Violation on Event Rates in the Direct Detection of Dark Matter
A full analytic analysis of the effects of CP violating phases on the event
rates in the direct detection of dark matter in the scattering of neutralinos
from nuclear targets is given. The analysis includes CP violating phases in
softly broken supersymmetry in the framework of the minimal supersymmetric
standard model (MSSM) when generational mixings are ignored. A numerical
analysis shows that large CP violating phases including the constraints from
the experimental limits on the neutron and the electron electric dipole moment
(EDM) can produce substantial effects on the event rates in dark matter
detectors.Comment: 17 pages, LaTex, including 2 figures; revised version to appear in
the Physical Review
Electroweak Baryogenesis: Concrete in a SUSY Model with a Gauge Singlet
SUSY models with a gauge singlet easily allow for a strong first order
electroweak phase transition (EWPT) if the vevs of the singlet and Higgs fields
are of comparable size. We discuss the profile of the stationary expanding
bubble wall and CP-violation in the effective potential, in particular
transitional CP-violation inside the bubble wall during the EWPT. The
dispersion relations for charginos contain CP-violating terms in the WKB
approximation. These enter as source terms in the Boltzmann equations for the
(particle--antiparticle) chemical potentials and fuel the creation of a baryon
asymmetry through the weak sphaleron in the hot phase. This is worked out for
concrete parameters.Comment: 46 pages, LaTeX, 11 figures, discussion of source terms and transport
equations modified, version to appear in Nucl. Phys.
CP violation in the process and supersymmetric grand unified theory
A triple vector correlation in the decay with
polarized muons is investigated as a probe to CP violating coupling constants
in supersymmetric models. A sizable triple correlation can be induced due to a
complex phase in the supersymmetric soft-breaking terms in the SU(5) grand
unified theory. Correlation with the electric dipole moments of electron and
neutron are investigated and it is shown that these quantities give independent
information on possible CP violating sources.Comment: 11 pages, 6 figures. Fig.2(a), fig.2(b) and fig.3 are changed due to
an error of our numerical calculation but main conclusion unchanged. Also
added some discussions and figures of the neutron EDM. Version to appear in
Physical Review D, Rapid Communication