Short-range test of the universality of gravitational constant G at the millimeter scale using a digital image sensor

K. Ninomiya, T. Akiyama, M. Hata, M. Hatori, T. Iguri, Y. Ikeda, S. Inaba, H. Kawamura, R. Kishi, H. Murakami, Y. Nakaya, H. Nishio, N. Ogawa, J. Onishi, S. Saiba, T. Sakuta, S. Tanaka, R. Tanuma, Y. Totsuka, R. TsutsuiK. Watanabe, J. Murata

研究成果: Article査読

抄録

The composition dependence of gravitational constant G is measured at the millimeter scale to test the weak equivalence principle, which may be violated at short range through new Yukawa interactions such as the dilaton exchange force. A torsion balance on a turning table with two identical tungsten targets surrounded by two different attractor materials (copper and aluminum) is used to measure gravitational torque by means of digital measurements of a position sensor. Values of the ratios and were and , respectively; these were obtained at a center to center separation of 1.7 cm and surface to surface separation of 4.5 mm between target and attractor, which is consistent with the universality of G. A weak equivalence principle (WEP) violation parameter of at the shortest range of around 1 cm was also obtained.

本文言語English
論文番号185005
ジャーナルClassical and Quantum Gravity
34
18
DOI
出版ステータスPublished - 2017 8 23

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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