関連する実験動画
Updated: May 16, 2026

07:46
Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
初期の宇宙におけるアルコールから漂う陽子対電子質量比に対する厳格な限界
Julija Bagdonaite1, Paul Jansen, Christian Henkel
1Department of Physics and Astronomy, VU University Amsterdam, Amsterdam, Netherlands.
まとめ
科学者たちは,初期の宇宙における陽子と電子の質量比 (μ) を調査した. 観測は大きな変化を示さないため,この基本定数は宇宙時間において安定したままでしたことを示唆している.
科学分野:
- コスモロジー・コスモロジーとは
- 基礎物理学 基礎物理学とは
- アストロケミストリー アストロケミストリー
背景:
- 物理学の標準モデルは,基本的な定数に依存しています.
- 宇宙時間におけるこれらの定数の定常性は,現在の理論では説明できない.
- 基本定数の変動を調査することで,標準モデルを超えた物理をテストすることができます.
研究 の 目的:
- 陽子と電子の質量比 (μ) の宇宙学的変化を制限する.
- 何十億年にもわたる基本的な物理定数の安定性をテストするためです.
主な方法:
- 初期宇宙におけるメタノール (CH3OH) 移行のラジオ天文学的観測を利用した.
- レッドシフト z = 0.89 のクエーサー PKS1830-211 のスペクトルデータを,実験室での測定で比較した.
- 微細構造定数と陽子対電子質量比を分析した.
主要な成果:
- 陽子と電子の質量比の変化に対する厳格な制約を導出: Δμ/μ = (0.0 ± 1.0) × 10−7.
- z = 0.89 (約70億年前) で観測された値は,変化がないと一致しています.
- この結果は,標準モデルからの潜在的な偏差に制限を設ける.
結論:
- 陽子と電子の質量比は,z = 0.89.8で有意な宇宙学的変化を示さない.
- この発見は,基本定数が大きな宇宙学的スケールと時間において安定しているという仮説を裏付けている.
- 異なる時代における変動をより精密に探求するために,さらなる観測が必要である.
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