Short-range Gravity experiment using digital image analysis

NEB 15 – Recent Developments in Gravity

Ninomiya, Kazufumi^1,2 ; Kishi, Reiko^1 ; Murakami, Haruna^1 ; Nishio, Hironori^1 ; Ogawa, Naruya^1 ; Taketani, Atsushi^2 ; Murata, Jiro^1

Department of Physics, Rikkyo University, Nishi-Ikebukuro, Tokyo 171-8501, Japan^1

RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan^2

关键词: Composition dependence;    Digital image analysis;    Experimental set up;    Extra dimensions;    Gravitational constant;    Inverse square law;    Millimeter-scale;    Weak equivalence principle;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/453/1/012007/pdf
DOI  :  10.1088/1742-6596/453/1/012007

来源: IOP

【 摘 要 】

According to a large extra dimension model, a deviation from Newton's inverse square law is expected at below sub-millimeter range. We have developed an experimental set up using a torsion balance pendulum and an online digital-image analysis system, aiming to test the Newtonian inverse square law at below millimeter scale. In addition, composition dependence of gravitational constant G is also tested at a millimeter scale, motivated to test the weak equivalence principle. In this paper, current status and results are described.