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Ephraim Fischbach

Bio: Ephraim Fischbach is an academic researcher from Purdue University. The author has contributed to research in topics: Casimir effect & Neutrino. The author has an hindex of 36, co-authored 282 publications receiving 6693 citations. Previous affiliations of Ephraim Fischbach include Stony Brook University & University of Washington.


Papers
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01 Oct 1998
TL;DR: In this paper, the Earth's gravity field is described as a non-Newtonian dynamical system, and the effects of external forces in the Kaon system are investigated.
Abstract: 1 Introduction.- 2 Phenomenological Description of Non-Newtonian Gravity.- 3 Searches for Composition-Independent Effects.- 4 Searches for Composition-Dependent Effects.- 5 Gravitational Properties of Antimatter.- 6 Effects of External Forces in the Kaon System.- 7 Spin-Dependent Intermediate-Range Forces.- 8 Epilogue.- A Gravity-Gradient Couplings to Torsion Pendants.- B Luther-Towler Cavendish Experiment.- C The Earth's Gravity Field.- Author Index.

473 citations

Journal ArticleDOI
TL;DR: The results of the Eoetvoes-Pekar-Fekete data are sensitive to the composition of the materials used, and that their results support the existence of an intermediate-range coupling to baryon number or hypercharge.
Abstract: We have carefully reexamined the results of the experiment of E\"otv\"os, Pek\'ar, and Fekete, which compared the accelerations of various materials to the Earth. We find that the E\"otv\"os-Pek\'ar-Fekete data are sensitive to the composition of the materials used, and that their results support the existence of an intermediate-range coupling to baryon number or hypercharge.

327 citations

Journal ArticleDOI
TL;DR: In this article, a micromechanical torsion oscillator was used to strengthen the limits on new Yukawa forces by determining the Casimir pressure between two gold-coated plates.
Abstract: A micromechanical torsion oscillator has been used to strengthen the limits on new Yukawa forces by determining the Casimir pressure between two gold-coated plates. By significantly reducing the random errors and obtaining the electronic parameters of the gold coatings, we were able to conclusively exclude the predictions of large thermal effects below $1\text{ }\text{ }\ensuremath{\mu}\mathrm{m}$ and strengthen the constraints on Yukawa corrections to Newtonian gravity in the interaction range from 29.5 nm to 86 nm.

311 citations

Journal ArticleDOI
TL;DR: In this paper, the authors reported an improved dynamic determination of the Casimir pressure Pexpt between two plane plates obtained using a micromachined torsional oscillator.

291 citations

Journal ArticleDOI
TL;DR: In this paper, the results of the experiment of Eotvos, Pekar, and Fekete were re-examined, and it was shown that the results were sensitive to the composition of the materials used, and that their results support the existence of an intermediate-range coupling to baryon number or hypercharge.
Abstract: We have carefully reexamined the results of the experiment of Eotvos, Pekar, and Fekete, which compared the accelerations of various materials to the Earth. We find that the Eotvos-Pekar-Fekete data are sensitive to the composition of the materials used, and that their results support the existence of an intermediate-range coupling to baryon number or hypercharge.

257 citations


Cited by
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Journal ArticleDOI
01 Apr 1988-Nature
TL;DR: In this paper, a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) is presented.
Abstract: Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

9,929 citations

Reference EntryDOI
31 Oct 2001
TL;DR: The American Society for Testing and Materials (ASTM) as mentioned in this paper is an independent organization devoted to the development of standards for testing and materials, and is a member of IEEE 802.11.
Abstract: The American Society for Testing and Materials (ASTM) is an independent organization devoted to the development of standards.

3,792 citations

Journal ArticleDOI
TL;DR: A comprehensive survey of recent work on modified theories of gravity and their cosmological consequences can be found in this article, where the authors provide a reference tool for researchers and students in cosmology and gravitational physics, as well as a selfcontained, comprehensive and up-to-date introduction to the subject as a whole.

3,674 citations

Journal ArticleDOI
TL;DR: Tests of general relativity at the post-Newtonian level have reached high precision, including the light deflection, the Shapiro time delay, the perihelion advance of Mercury, the Nordtvedt effect in lunar motion, and frame-dragging.
Abstract: The status of experimental tests of general relativity and of theoretical frameworks for analyzing them is reviewed and updated. Einstein’s equivalence principle (EEP) is well supported by experiments such as the Eotvos experiment, tests of local Lorentz invariance and clock experiments. Ongoing tests of EEP and of the inverse square law are searching for new interactions arising from unification or quantum gravity. Tests of general relativity at the post-Newtonian level have reached high precision, including the light deflection, the Shapiro time delay, the perihelion advance of Mercury, the Nordtvedt effect in lunar motion, and frame-dragging. Gravitational wave damping has been detected in an amount that agrees with general relativity to better than half a percent using the Hulse-Taylor binary pulsar, and a growing family of other binary pulsar systems is yielding new tests, especially of strong-field effects. Current and future tests of relativity will center on strong gravity and gravitational waves.

3,394 citations

Journal ArticleDOI
TL;DR: In this paper, the cosmological constant problem in the light of dilatation symmetry and its possible anomaly is discussed, and it is shown that the energy-momentum tensor in the vacuum is purely anomalous and that deviations from the standard hot big bang cosmology are possible.

2,385 citations