About the Eötvös experiment and the hypercharge theory

A careful analysis of the linear correlation between the data of the Eötvös experiment and the baryon number per unit atomic mass shows (i) that it has a positive slope and approximately goes through the origin, and (ii) that the errors are so great that it can accomodate the weak equivalence principle of general relativity as well as the hypercharge theory of Fischbach et al., both for an attractive or a repulsive force.     

Eötvös bounds on couplings of fundamental parameters to gravity

The possible dependence of fundamental couplings and mass ratios on the gravitational potential has been bounded by comparing atomic clock frequencies over Earth's elliptical orbit. Here we evaluate bounds on such a dependence from E?tv?s-type experiments that test the weak equivalence principle, including previously neglected contributions from nuclear binding energy. We find that variations of fundamental parameters correlated with the gravitational potential are limited at 10(-8)-10(-9), an improvement of 2-3 orders of magnitude over atomic clock bounds.     

Source-free electromagnetic fields in the Einstein-Gödel universe

A metric containing a parameter (² = 1) has been derived which represents axially symmetric source-free electromagnetic fields in a static Einstein universe when is put equal to 1. The same metric represents the source-free electromagnetic fields in a Gödel rotating universe when is put equal to-1. Many known solutions are obtained as particular cases.     

Backscattering Mössbauer MIMOS II and XRF studies on tektites from different strewn fields

Room temperature ⁵⁷Fe Mössbauer spectroscopy has been used to obtain information on the redox and coordination of iron in tektites. A MIMOS II spectrometer in backscattering geometry has been used in the study, so that no sample preparation at all was required. X-ray fluorescence has been used to determine the composition of the tektites. Mössbauer spectra have been deconvoluted using three extended Voigt-based profiles to allow quantitative analysis of iron atoms valence and coordination. In all tektites, the Fe $^{2+ }$ sites have been distinguished in Fe with octahedral and tetrahedral coordination. The Fe $^{2+}$ octahedral sites show a region of isomer shift (IS) and quadrupole splitting (QS), IS $=$ 1.02–1.14 mm/s and QS $=$ 1.82–2.12 mm/s, relative to $\alpha $ -Fe. The Fe $^{2+ }$ tetrahedral sites show a region of hyperfine parameters of IS = 0.59–0.89 mm/s and QS = 1.14–1.60 mm/s. The Fe³⁺sites show IS = 0.11–0.33 mm/s and QS = 0.02–0.04 mm/s. The Fe³⁺/Fe²⁺ ratio was found to be 0.025–0.149.     

Futurev �� oscillation experiments and present data

Our goal in this paper is to examine the discovery covery potential of laboratory experiments searching for the oscillationv _??(?? _e)??v _??, in the light of recent data on solar and atmospheric neutrino experiments, which we analyse together with the most restrictive results from laboratory experiments on neutrino oscillations. In order to explain simultaneouslyall present results we use a four-neutrino framework, with an additional sterile neutrino. Our predictions are rather pessimistic for the upcoming experiments NOMAD and CHORUS, which, we find, are able to explore only a small area of the oscillation parameter space. On the other hand, the discovery potential of future experiments is much larger. We consider three examples. E803, which is approved to operate in the future Fermilab main injector beam line, MINOS, a proposed long-baseline experiment also using the Fermilab beam, and NAUSICAA, an improved detector which improves by an order of magnitude the performance of CHORUS/NOMAD and can be operated either at CERN or at Fermilab beams. We find that those experiments can cover a very substantial fraction of the oscillation parameter space, having thus a very good chance of discoveringboth v _????v _?? and?? _e??v _?? oscillation modes.     

Kalb–Ramond fields and the CMBR

Cosmological implications on the polarization of the cosmic microwave background radiation, of a Kalb–Ramond field interacting with gauge fields and gravity as dictated by quantum consistency of heterotic string theory are surveyed. A parity violating augmentation going beyond the dictates of string theory is shown to lead to possible appearance of a B mode generated in the cosmic microwave background (CMB) in the post-last scattering epoch. This generation of the B mode of CMB appears to be dramatic when the augmentation is embedded within a Randall–Sundrum braneworld scenario of the first kind.