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SLIDES: The Green Climate Fund: Challenges and Opportunities: Some Thoughts on How the Green Climate Fund Could Close the Energy Justice Gap
Presenter: Martin Hiller, Director‐General, Renewable Energy and Energy Efficiency Partnership (REEEP), Vienna, Austria
22 slide
Diagnosing lepton-nonuniversality in
Ratios of branching fractions of semileptonic B decays,
over with are sensitive
probes of lepton universality. In the Standard Model, the underlying flavor
changing neutral current process is lepton flavor
universal. However models with new flavor violating physics above the weak
scale can give substantial non-universal contributions. The leading
contributions from such new physics can be parametrized by effective dimension
six operators involving left- or right-handed quarks. We show that in the
double ratios , and the dependence on
new physics coupling to left-handed quarks cancels out. Thus a measurement of
any of these double ratios is a clean probe of flavor nonuniversal physics
coupling to right-handed quarks. We also point out that the observables
, , and depend on the same
combination of Wilson coefficients and therefore satisfy simple consistency
relations.Comment: 20 pages, 4 plots; axialvector K1 include
Flavor Changing Processes in Supersymmetric Models with Hybrid Gauge- and Gravity-Mediation
We consider supersymmetric models where gauge mediation provides the dominant
contributions to the soft supersymmetry breaking terms while gravity mediation
provides sub-dominant yet non-negligible contributions. We further assume that
the gravity-mediated contributions are subject to selection rules that follow
from a Froggatt-Nielsen symmetry. This class of models constitutes an example
of viable and natural non-minimally flavor violating models. The constraints
from mixing in the neutral K system imply that the modifications to the
Standard Model predictions for mixing in the neutral B_d and B_s systems are
generically at most at the percent level, but can be of order ten percent for
large . The modifications for the neutral D system mixing are
generically at most of order a few percent, but in a special subclass of models
they can be of order one. We point out processes relevant for
flavor violation in hybrid mediation.Comment: 30 pages, 3 figure
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