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Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
1.5-100 GeVのエネルギーを持つ宇宙線における異常なポジトロン豊富さ
O Adriani1, G C Barbarino, G A Bazilevskaya
1University of Florence, Department of Physics, Via Sansone 1, I-50019 Sesto Fiorentino, Florence, Italy.
Nature
|April 3, 2009
まとめ
宇宙線ポジトロンは,エネルギー1.5-100 GeVの間の分数の急激な増加を示しています. この発見は,暗黒物質や天体などの主要な源が,観測されたポジトロンフクスを説明するために必要であることを強く示唆しています.
科学分野:
- 宇宙線物理学 宇宙線物理学
- 粒子天体物理学とは
- 高エネルギー天体物理学
背景:
- 反粒子は,ポジトロンと同様に,宇宙線の一小部分である.
- 二次的源 (宇宙線相互作用) と一次的源 (パルサー,暗黒物質) は,提案された起源である.
- 以前の測定は,一次情報源を暗示していたが,統計的な力には欠けていた.
研究 の 目的:
- 高精度で宇宙線におけるポジトロン分子を測定する.
- 宇宙線におけるポジトンの起源を決定する.
- 観察の一貫性を二次生産モデルとテストする.
主な方法:
- 1.5-100 GeVのエネルギー範囲におけるポジトロン分子の測定
- ポジトロン信号を区別するために,宇宙線データの分析.
- 観測されたポジトロン分数の理論的予測との比較.
主要な成果:
- ポジトロン分数の急激な増加は,1.5-100 GeVのエネルギー範囲の重要な部分で観察されました.
- 観測された増加は,二次生産モデルからの予測と矛盾しています.
- このデータは,プライマリ・ポジトロン源の存在を強く支持しています.
結論:
- コスミックレイのポジトロンの主要な源が必要である.
- パルサーや暗黒物質の消滅のような天体物理学的な物体は,信憑性の高い主要な情報源である.
- 陽子過剰を説明するために,原始源に対するさらなる調査が必要である.
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