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Recent results on short-range gravity experiment

Maki Hata1, Takashi Akiyama1, Yuki Ikeda1, Hirokazu Kawamura1,2, Keigo Narita1, Kazufumi Ninomiya1, Naruya Ogawa1, Toshiaki Sato1, Etsuko Seitaibashi1, Yuta Sekiguchi1, Ryosuke Tsutsui1, Kazumasa Yazawa1 and Jiro Murata1

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According to the ADD model [1], deviation from Newton's inverse square law is expected at below sub-millimeter scale. Present study is an experimental investigation of the Newton's gravitational law at a short range scale. We have developed an experimental setup using torsion balance bar, and succeeded to confirm the inverse square law at a centimeter scale. In addition, composition dependence of gravitational constant G is also tested at the centimeter scale, motivated to test the weak equivalence principle.


PACS

04.80.Cc Experimental tests of gravitational theories

Subjects

Gravitation and cosmology

Dates

Issue 1 (2009)



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