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Updated: Jun 24, 2025

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来自LHC数据的同位素洛伦茨违规的新约束
David Amram1, Killian Bouzoud2, Nicolas Chanon1
1Université de Lyon, Université Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822, Villeurbanne, France.
Physical review letters
|June 10, 2024
概括
新的计算探索光子衰变为费米子,测试洛伦兹不变性 (LV) 违规. LHC数据为LV设定了一个新的,改进的极限,增强了光子生产的限制.
科学领域:
- 高能物理 高能物理
- 粒子物理学 粒子物理学
- 宇宙学的宇宙学是什么?
背景情况:
- 洛伦兹不变性 (LV) 是现代物理学的基石,但超越标准模型的理论探索潜在的违规行为.
- 标准模型扩展 (SME) 提供了一个框架来参数化和搜索这些LV效应.
- 大强子对撞机 (LHC) 的光子产生为新的物理现象提供了敏感的探测器.
研究的目的:
- 提出新的计算,以光子衰变为费米离子对在真空中与同otropic LV.
- 使用这些计算来解释LHC运行2数据,包括即时光子生产.
- 建立对同位素LV系数的严格约束.
主要方法:
- 在同位素LV下对光子衰变动力学进行了新的理论计算.
- 分析了LHC运行2数据,用于包括即时光子产生高达2.5TeV的横向能量.
- 在标准模型扩展框架内解释实验结果.
主要成果:
- 在 95% 置信级别下,在同位素 LV 系数上确定了 κ[over ̃]_{tr}>-1.06×10^{-13} 的下界.
- 这一界限代表了显著的改进,比哈德龙碰撞器以前的界限提高了55倍.
- 计算还显示了通过离子对的产生来限制LV系数的潜力.
结论:
- LHC Run 2 提示光子生产数据提供了迄今为止对同位素洛伦兹不变违规的最强约束.
- 这些发现凸显了高能碰撞器数据在测试基本物理原理方面的力量.
- 开发的理论框架对于限制其他LV系数具有更广泛的应用.
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