Much work has been devoted to the phenomenology and cosmology of the socalled braneworld universe, where the (3+1)-dimensional universe familiar to us lies on a brane surrounded by a (4+1)-dimensional bulk spacetime that is essentially empty except for a negative cosmological constant and the various modes associated with gravity. For such a braneworld cosmology, the difficulty of justifying a ...

Investigations on the resonancelike phenomenon in collisional flavor instability (CFI) of neutrinos, which were observed linear phase recently, are reported. We show that it occurs not only for isotropy-preserving modes as pointed out previous work but also isotropy-breaking and enhances growth rate CFI. Employing analysis nonlinear numerical simulations two-flavor scheme under relaxation appro...

A test of Lorentz invariance for electromagnetic waves was performed by comparing the resonance frequencies of two stable optical resonators as a function of orientation in space. The crystalline resonators were operated at 3.4 K in a cryostat employing a pulse-tube refrigerator. A new analysis yields the Robertson-Mansouri-Sexl theory parameter combination β − δ − 1/2 = (−0.6 ± 2.1 ± 1.2) · 10...