arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.04384hep-ph
收藏

非价态对重-轻介子形状因子贡献的估计

An estimation of non-valence contributions to form factors of heavy-light mesons

María Gómez-Rocha, Oliver Heger, Wolfgang Schweiger

摘要:

研究了非价夸克对贡献对重-轻介子弱跃迁形状因子的影响。形状因子首先计算类空动量转移的参考系,在这种贡献被抑制。解析延续类时区域和直接衰变计算的比较,与纯价自由度,提供了一个估计的作用,夸克对的贡献可能发挥。我们使用相对论性量子力学的点形式,这在处理重-轻系统时特别有用。

英文摘要:

We study the influence of non-valence quark-pair contributions in weak transition form factors of heavy-light mesons. Form factors are first calculated for spacelike momentum transfers in a reference frame where such contributions are suppressed. Analytic continuation to the timelike region and a comparison with the direct decay calculation, done with pure valence degrees of freedom, provides an estimate of the role that quark-pair contributions may play. We use the point form of relativistic quantum mechanics, which is particularly useful when treating heavy-light systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑