从极子参数到线形和分支比,从极子参数到线形和分支比
L A Heuser1,2, G Chanturia2, F-K Guo3,4,5
1Forschungszentrum Jülich, Institute for Advanced Simulation, 52425 Jülich, Germany.
The European physical journal. C, Particles and fields
|November 8, 2024
概括
这项研究将理论共振参数与实验线形连接起来,使得可以准确计算像J/psi和Upsilon共振这样的粒子的部分宽度和分支比率.
科学领域:
- 粒子物理学 粒子物理学
- 量子场理论 量子场理论
背景情况:
- 共振是由复杂的极点位置和残留物定义的.
- 在实验中,共振表现为不变质量分布中的结构.
- 分支分数是从实验计数率来确定的.
研究的目的:
- 建立理论共振参数与实验线形之间的联系.
- 根据这种连接,导出部分宽度和分支比的表达式.
- 用J/psi和Upsilon共振来验证拟议的形式主义.
主要方法:
- 开发一种形式主义,将共振参数 (极点,残余) 与线形联系起来.
- 从共振参数推断直线形状.
- 导出部分宽度和分支比的公式.
主要成果:
- 提出了一种方法,将共振参数与线形连接起来.
- 得到部分宽度和分支比的表达式.
- 这种形式主义通过对J/psi和Upsilon共振的详细研究来证明.
结论:
- 拟议的方法提供了一种方法,可以将理论和实验共振表征联系起来.
- 对于部分宽度和分支比的衍生式提供了一个新的方法.
- 该研究通过特定的共振示例验证了形式主义.
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