arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1205.4547hep-ph
收藏

高能下$e^-e^+\to t \bar t$的超简分析

A supersimple analysis of $e^-e^+\to t \bar t$ at high energy

G. J. Gounaris, F. M. Renard

摘要:

根据MSSM中的超简单性,重整化方案(SRS)可以被定义为任何高能2到2过程,到1 loop EW阶;其中螺旋度守恒(HC)振幅,被表示为三个通用的包含矩阵形式的线性组合。所有其他螺旋度振幅渐近消失。在这些SRS振幅中加入相应的反项,得到了高能HC振幅在壳层上重整化的“超简单”表达式。在此之前,这一性质在大量不涉及汤川相互作用或重整化群修正的过程中被注意到。在这里,我们将其扩展到$e^-e^+\to t \bar t$,它涉及大的汤川和重整化群的贡献。我们表明,由此产生的“超简单”的表达式可以提供一个准确的描述,即使在能量相媲美的超对称尺度。这样的描述清楚地确定了重要的超对称性效应的起源,它们可以用于快速约束物理学的贡献,超越MSSM。

英文摘要:

According to supersimplicity in MSSM, a renormalization scheme (SRS) may be defined for any high energy 2-to-2 process, to the 1loop EW order; where the helicity conserving (HC) amplitudes, are expressed as a linear combination of just three universal logarithm-involving forms. All other helicity amplitudes vanish asymptotically. Including to these SRS amplitudes the corresponding counter terms, the "supersimple" expressions for the high energy HC amplitudes, renormalized on-shell, are obtained. Previously, this property was noted for a large number of processes that do not involve Yukawa interactions or renormalization group corrections. Here we extend it to $e^-e^+\to t \bar t$, which does involve large Yukawa and renormalization group contributions. We show that the resulting "supersimple" expressions may provide an accurate description, even at energies comparable to the SUSY scale. Such descriptions clearly identify the origin of the important SUSY effects, and they may be used for quickly constraining physics contributions, beyond MSSM.

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。

↑