Showing papers by "Ephraim Fischbach published in 2021"
TL;DR: In this article, the authors argue that searching for a composition-dependent fifth force necessarily requires data from experiments in which the acceleration differences of three or more independent pairs of test samples of varying composition are determined.
4 citations
TL;DR: A review of current experimental information leads to suggest that the angular distribution of decay products may be anisotropic, and that angular distribution may be influenced by the ambient neutrino flux as discussed by the authors.
Abstract: Some experiments seem to yield strong evidence of variability of beta-decay rates, but other experiments may show little or no such evidence Some recent experiments help clarify the situation In particular, a certain oscillation appears in neutrino measurements made at the Super-Kamiokande Neutrino Observatory and in radon beta-decay measurements made at the Geological Survey of Israel, with identical frequency (943 year -1), amplitude and phase, strengthening the case for an influence of neutrinos on beta decays A review of current experimental information leads us to suggest that (1) beta-decay rates do not change, but (2) the angular distribution of decay products may be anisotropic, and (3) the angular distribution of decay products may be influenced by the ambient neutrino flux It appears that experiments at standards laboratories tend to be insensitive to direction, and this may be the reason that they tend not to exhibit evidence of variability
4 citations
Posted Content•
TL;DR: In this paper, the authors investigated the sources of the six-hour signal from SN1987A and found that the sources are similar to those of the Si/Cl signal, which could in principle explain the local increase in the density of axionic dark matter induced by a gravity wave.
Abstract: The temporal coincidences of events detected in four neutrino detectors and two gravitational antennas still remains among the most puzzling phenomena associated with SN1987A. The coincidences form a six-hour signal approximately coincident in time with the well-known LSD signal at 2h52m UT on 23/02/1987. After 30 years of research, the characteristics and the shape of the six-hour signal have been studied quite well, but the mechanisms of its formation have not been fully understood as of yet. Here we suggest that data obtained from another technology, radioactive decays, might provide new insights into the origin of signals previously seen in neutrino detectors and gravity wave detectors. On August 17, 2017, at 12h41m UT, the GW170817 signal was detected by LIGO and Virgo. At the same time, an approximately 7-hour long signal coincident with GW170817 was detected in the Si/Cl experiment on precision measurement of the $^{32}$Si half-life. We show that the Si/Cl signal is unexpectedly similar to the six-hour signal from SN1987A. In addition, we establish that the sources of the coinciding events are similar to those of the Si/Cl signal. To explain the surprising similarities in both signals, we present a mechanism which could in principle account for this phenomenon in terms of a local increase in the density of axionic dark matter induced by a gravity wave.
1 citations
Posted Content•
TL;DR: In this article, the authors argue that despite the great precision of these experiments, the lack of diversity of samples may mean they are unable to detect new composition-dependent forces, which requires the observation of a pattern in the data.
Abstract: Recently we drew attention to the fact that most recent 5th force searches and tests of the weak equivalence principle (WEP) utilize only one or two pairs of test samples. We argue that, despite the great precision of these experiments, the lack of diversity of samples may mean they are unable to detect new composition-dependent forces, which requires the observation of a pattern in the data. Such a pattern was observed in the experiment by Eotvos, Pekar, and Fekete (EPF), the last high precision test of the WEP which used a significant number of different samples. We advocate for new experiments utilizing a sufficient number and range of samples to either confirm or refute the pattern found in the EPF experimental data.
Posted Content•
TL;DR: In this article, the authors reanalyzed data obtained by Potter in a 1923 experiment aimed at testing whether the accelerations of test masses in the Earth's gravitational field are independent of their compositions.
Abstract: We have reanalyzed data obtained by Potter in a 1923 experiment aimed at testing whether the accelerations of test masses in the Earth's gravitational field are independent of their compositions. Although Potter concludes that the accelerations of his samples compared to a brass standard were individually consistent with a null result, we show that the pattern formed from a combined plot of all of his data suggests the presence of a fifth force coupling to baryon number.