Tests of the Gravitational Inverse Square Law at Short Ranges

Newman, R. D.; Berg, E. C.; Boynton, P. E.

doi:10.1007/s11214-009-9540-7

Cited by 47 publications

(36 citation statements)

References 35 publications

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“…These components are detailed in figure 4. The apparatus, pictured in figure 5, was decommissioned and recycled in September 2011 after being used to conduct an inverse-square-law-violation test with Paul Boynton of the University of Washington (also reported on in these proceedings) [6]. …”

Section: The Uci Measurementmentioning

confidence: 99%

“…Refer back to figure 8 to see how misjudging the amplitude can directly affect the expected period shift and thus the inferred value of G. Amplitudes are calculated using the 20 reflections per revolution caused by 8 auxiliary mirrors. i f A > 2π, ΔΘ re f = 2π or 4π i f A < π, need to calibrate ΔΘ re f relative to 2π (6) What about harmonics? Recall equation 3.…”

Section: Accuracy Of Amplitude Determinationsmentioning

confidence: 99%

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Measurement ofGUsing a Cryogenic Torsion Pendulum: Post-2008 Analysis Review

Newman

Bantel

Berg

et al. 2014

EPJ Web of Conferences

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Abstract. A measurement of G by our University of California, Irvine (UCI) team was reported at the 2008 Conference on Precision Electromagnetic Measurements (CPEM) [1]. This work has not yet been published; work continues to review and refine analysis of data from that measurement. We present in this paper the analysis and results of the measurement as it stood at the time of the 2008 conference, and discuss the analysis review under way. Our G measurement was conducted "blind", keeping the exact value of the source mass hidden until just before the conference presentation.

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Section: The Uci Measurementmentioning

confidence: 99%

Section: Accuracy Of Amplitude Determinationsmentioning

confidence: 99%

Measurement ofGUsing a Cryogenic Torsion Pendulum: Post-2008 Analysis Review

Newman

Bantel

Berg

et al. 2014

EPJ Web of Conferences

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“…Furthermore, as mentioned earlier, the extra interaction between nucleons due to the U-boson exchange may affect properties of neutron stars [6][7][8]87] although it has no effect on properties of finite nuclei [88]. It may also cause the deviation from the inverse-square-law of gravity, see, e.g., [89][90][91][92][93][94] for recent reviews. The aforementioned studies and findings have motivated considerable interest in searching for the U-boson [95].…”

Section: B Heavy-ion Reactions As a Possible Tool For Dark U-boson Smentioning

confidence: 99%

Effects of nuclear symmetry energy on η meson production and its rare decay to the dark U-boson in heavy-ion reactions

Yong

2013

Physics Letters B

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Using a relativistic transport model ART1.0, we explore effects of nuclear symmetry energy on η meson production and its rare decay to the dark U-boson in heavy-ion reactions from 0.2 to 10 GeV/nucleon available at several current and future facilities. The yield of η mesons at sub-threshold energies is found to be very sensitive to the density dependence of nuclear symmetry energy. Above a beam energy of about 5 GeV/nucleon in Au+Au reactions, the sensitivity to symmetry energy disappears. Using the branching ratio of the rare η decay (η → γU ) available in the literature, we estimate the maximum cross section for the U-boson production in the energy range considered, providing a useful reference for future U-boson search using heavy-ion reactions.PACS numbers: 21.65.Mn, 21.65.Ef, 95.35.+d

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“…As indicated by the blue curve in Figure 1, this limit is roughly an order of magnitude lower than published limits at neighboring ranges between 100 μm and 10 m. [4], B Irvine [5], C Irvine [6], and D Maryland [7], with the projected constraint for this project. See also [8].…”

Section: Introductionmentioning

confidence: 99%

Was Newton right? A search for non-Newtonian behavior of weak-field gravity

Boynton

Moore

Newman

et al. 2014

EPJ Web of Conferences

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Abstract. Empirical tests of Einstein's metric theory of gravitation, even in the nonrelativistic, weak-field limit, could play an important role in judging theory-driven extensions of the current Standard Model of fundamental interactions. Guided by Galileo's work and his own experiments, Newton formulated a theory of gravity in which the force of attraction between two bodies is independent of composition and proportional to the inertia of each, thereby transparently satisfying Galileo's empirically informed conjecture regarding the Universality of Free Fall. Similarly, Einstein honored the manifest success of Newton's theory by assuring that the linearized equations of GTR matched the Newtonian formalism under "classical" conditions. Each of these steps, however, was explicitly an approximation raised to the status of principle. Perhaps, at some level, Newtonian gravity does not accurately describe the physical interaction between uncharged, unmagnetized, macroscopic bits of ordinary matter. What if Newton were wrong? Detecting any significant deviation from Newtonian behavior, no matter how small, could provide new insights and possibly reveal new physics. In the context of physics as an empirical science, for us this yet unanswered question constitutes sufficient motivation to attempt precision measurements of the kind described here. In this paper we report the current status of a project to search for violation of the Newtonian inverse square law of gravity.

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Tests of the Gravitational Inverse Square Law at Short Ranges

Cited by 47 publications

References 35 publications

Measurement ofGUsing a Cryogenic Torsion Pendulum: Post-2008 Analysis Review

Measurement ofGUsing a Cryogenic Torsion Pendulum: Post-2008 Analysis Review

Effects of nuclear symmetry energy on η meson production and its rare decay to the dark U-boson in heavy-ion reactions

Was Newton right? A search for non-Newtonian behavior of weak-field gravity

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