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arXiv 2009.00301hep-ph
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电子正电子湮没中底夸克的能量和角分布$e^+e^-\to b \, W^+ \, \bar{t}$

Energy and angular distributions of the bottom quark in the electron-positron annihilation $e^+e^-\to b \, W^+ \, \bar{t}$

I. V. Truten, A. Yu. Korchin

摘要:

在与紧凑型直线对撞机第一建造阶段相对应的$e^+ e^-$能量下,考虑了过程$e^+ e^- \to t \, \bar{t} \to b \, W^+ \, \bar{t}$中底夸克的分布。导出并计算了$e^+ e^- \to b \ldots$截面随$b$ -夸克能量和电子束方向夹角的变化关系。标准模型之外的物理效应通过自然出现在有效场论中的修正的$γt \bar{t}$和$Z t \bar{t}$耦合被包括在内。除了计算截面外,还计算了能量和角不对称性。计算了这些观测量对$e^+ e^-$能量的依赖关系,并研究了这种依赖关系的特点。

英文摘要:

The distributions of the bottom quark in the process $e^+ e^- \to t \, \bar{t} \to b \, W^+ \, \bar{t}$ are considered at the $e^+ e^-$ energy corresponding to the first construction stage of the Compact Linear Collider. The cross sections of $e^+ e^- \to b \ldots$, as functions of the $b$-quark energy and angle with respect to the direction of the electron beam, are derived and calculated. The effects of physics beyond the Standard Model are included via the modified $γt \bar{t}$ and $Z t \bar{t}$ couplings which naturally appear in effective field theories. In addition to the cross sections, the energy and angular asymmetries are calculated. The dependence of these observables on the $e^+ e^-$ energy is calculated, and features of this dependence are investigated.

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。

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