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在e^{+}e^{-}→ZH中对下一个主要顺序的弱标准模型有效场理论校正的影响
Konstantin Asteriadis1, Sally Dawson2, Pier Paolo Giardino3
1Institute for Theoretical Physics, <a href="https://ror.org/01eezs655">University of Regensburg</a>, 93040 Regensburg, Germany.
Physical review letters
|December 23, 2024
概括
在标准模型有效场理论中,我们对产生Z玻色子和希格斯玻色子的电子-正电子碰撞进行了完整的计算. 我们的发现强调了精确计算的重要性,并将不同能量尺度的测量结合起来,以获得准确的物理洞察力.
科学领域:
- 高能物理 高能物理
- 粒子物理学 粒子物理学
- 量子场理论 量子场理论
背景情况:
- 标准模型 (SM) 是粒子物理学的当前框架,但它可能是不完整的.
- 标准模型有效场理论 (SMEFT) 扩展了SM,在更高的能量尺度上探测新的物理.
- 精确计算对于解释实验数据和寻找超越SM的物理学至关重要.
研究的目的:
- 为了在SMEFT框架内对过程e^{+}e^{-}→ZH进行完整的下一个领先顺序 (NLO) 计算.
- 将六维运营商的所有贡献纳入SMEFT扩展中.
- 调查SM以外的参数对新型依赖关系,并评估它们对过程的影响.
主要方法:
- 使用完整的下一个领先顺序 (NLO) 扰动量子场理论计算.
- 纳入标准模型有效场理论 (SMEFT) 框架内的所有六维运算符.
- 分析了 CP 违反参数,希格斯自我合,顶级夸克 Yukawa 合和四费米子运算子的影响.
主要成果:
- 确定了NLO的新型依赖性,包括宽度部门中违反CP的参数的影响.
- 揭示了改造的希格斯玻色子自我合和顶级夸克Yukawa合的影响.
- 证明,重新规范化组缩放对数单独可以产生误导性的结果.
结论:
- 在SMEFT中进行完整的NLO计算对于准确预测e^{+}e^{-}→ZH生产至关重要.
- 结合来自不同能量尺度的测量,为新的物理参数提供了强大的约束.
- 这项研究强调了精确理论计算的必要性,以促进粒子物理学的发展.
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