arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1111.1284hep-ph
收藏

顶夸克作为共振

Top quark as a resonance

A. E. Kaloshin, V. P. Lomov

摘要:

我们建议用正负能极分离的形式描述宇称不守恒的缀饰费米子传播子。我们找到了$γ$矩阵离壳投影的一般形式和相应的共振因子。宇称破坏导致偏离天真Breit-Wigner形式的共振因子和非平凡的自旋修正的外观。而对于顶夸克,由于$Γ/m\ll1$的存在,共振因子又回到了标准的共振因子。

英文摘要:

We suggest the description of the dressed fermion propagator with parity non-conservation in the form with separated positive and negative energy poles. We found general form of the $γ$-matrix off-shell projectors and corresponding resonance factors. The parity violation leads to deviation of resonance factors from the naive Breit--Wigner form and to appearance of non-trivial spin corrections. However, for top quark with SM vertex the resonance factor returns to the standard one due to $Γ/m\ll1$.

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。

↑