2つの独立した方法を用いて重力定数の測定
Qing Li1, Chao Xue2,3, Jian-Ping Liu1
1MOE Key Laboratory of Fundamental Physical Quantities Measurements, Hubei Key Laboratory of Gravitation and Quantum Physics, School of Physics, Huazhong University of Science and Technology, Wuhan, China.
Nature
|August 31, 2018
まとめ
ニュートンの重力定数 (G) は,2つの新しいトルション・ペンドル法で前代未聞の精度で決定されました これらの発見は,基本的な物理学と現在の測定の不一致を解決するために不可欠な,より正確なG値を提供します.
科学分野:
- 物理学
- メトロロジー
- 基本定数
背景:
- ニュートンの重力定数 (G) は基本的ですが,正確に決定された値がありません.
- G測定の不一致は,既存の実験方法の体系的なエラーを示唆しています.
- 重力理論を検証し 宇宙を理解するために 精密なGの決定は不可欠です
研究 の 目的:
- 新しい実験技術を用いて重力定数 (G) を独立に測定する.
- Gの測定における不確実性を減らし,既存の測定の不一致を解決する.
- 基礎物理の応用に高度に精密なG値を提供するためです.
主な方法:
- 2つの異なる方法:振動時間と角加速フィードバックを使用したトルションペンデューム実験.
- 系統的エラーを最小限に抑えるためにGの独立測定を行った.
- 精巧な実験装置とデータ分析により 高精度を達成した.
主要な成果:
- 2つの独立したG値が得られた:6.674184 × 10−11 m3/kg/s2と6.674484 × 10−11 m3/kg/s2.
- 報告された相対的標準の不確実性は,それぞれ100万分の11.64と11.61である.
- これらの結果は,Gについてこれまでに報告された最低の不確実性を表しています.
結論:
- 新しいG値は,これまでで最も正確な測定値を提供します.
- 両方の結果は2つの標準偏差で現在の推奨値と一致します.
- これらの発見は,G測定の不一致を解決し,基本的な物理を進めるのに寄与します.
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