42,201 research outputs found
Braneworlds, Conformal Fields and the Gravitons
We investigate the dynamics of Randall-Sundrum AdS5 braneworlds with
5-dimensional conformal matter fields. In the scenario with a compact fifth
dimension the class of conformal fields with weight -4 is associated with exact
5-dimensional warped geometries which are stable under radion field
perturbations and describe on the brane the dynamics of inhomogeneous dust,
generalized dark radiation and homogeneous polytropic dark energy. We analyse
the graviton mode flutuations around this class of background solutions and
determine their mass eigenvalues and wavefunctions from a Sturm-Liouville
problem. We show that the localization of gravity is not sharp enough for large
mass hierarchies to be generated. We also discuss the physical bounds imposed
by experiments in particle physics, in astrophysics and in precise measurements
of the low energy gravitational interaction.Comment: LaTeX, 9 pages, 2 figures. Based on talk given in the Second
International Conference on Quantum Theories and the Renormalization Group in
Gravity and Cosmology, CSIC and University of Barcelona, Barcelona, Spain,
11-15 July 2006. Submitted to be published in the Conference Proceedings, J.
Phys. A: Math. Ge
Candidate MKiD nucleus 106Rh in triaxial relativistic mean-field approach with time-odd fields
The configuration-fixed constrained triaxial relativistic mean-field approach
is extended by including time-odd fields and applied to study the candidate
multiple chiral doublets (MKiD) nucleus 106Rh. The energy contribution from
time-odd fields and microscopical evaluation of center-of-mass correction as
well as the modification of triaxial deformation parameters beta, gamma due to
the time-odd fields are investigated. The contributions of the time-odd fields
to the total energy are 0.1-0.3 MeV and they modify slightly the gamma values.
However, the previously predicted multiple chiral doublets still exist.Comment: 9 pages, 3 figures, accepted for publication as a Brief Report in
Physical Review
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