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Updated: Jun 24, 2025

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Published on: November 15, 2013
上下干扰对完全包容的希格斯粒子生成的贡献
Michał Czakon1, Felix Eschment1, Marco Niggetiedt2
1Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen University, 52056 Aachen, Germany.
我们在量子染色力学 (QCD) 中计算了希格斯生成的上下干扰在次要次要的顺序. 这种关键的计算减少了希格斯截面预测中的不确定性.
科学领域:
- 高能物理 高能物理
- 量子色态动力学 (QCD) 是一个
- 粒子物理学 粒子物理学
背景情况:
- 希格斯玻色子生产截面对于理解电弱对称性破坏至关重要.
- 精确的理论预测是必要的,以解释大型强子对撞机 (LHC) 的实验结果.
- 底部夸克质量效应虽然被压制,但会影响这些预测的准确性.
研究的目的:
- 为了评估上下干扰对完全包容的希格斯生产截面的贡献.
- 在QCD中以下一个到下一个到领先的顺序 (NNLO) 确定这一贡献.
- 为了减少希格斯截面计算中的领先理论不确定性.
主要方法:
- 在NNLO进行扰乱性QCD计算.
- 在计算中包括底部夸克质量效应.
- 对顶部和底部夸克贡献之间的干扰项的评估.
主要成果:
- 在13 TeV时,总的上下干扰效应为 -1.99(1) +0.30 -0.15 pb.
- 纯的O ((α_{s}^{4}) 校正是0.43 pb.
- 这一结果量化了理论不确定性的重要来源.
结论:
- 上下干扰对希格斯粒子产生有着不可忽视的贡献.
- 对这些效应的准确计算对于精确的希格斯截面预测至关重要.
- 这项工作有助于解决希格斯物理学中领先的理论不确定性.
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