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arXiv 0705.3946hep-phhep-th
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非粒子与标准模型粒子的相互作用

Interactions of Unparticles with Standard Model Particles

Shao-Long Chen, Xiao-Gang He

摘要:

研究了由Georgi引起的$d_{\cal {U}}$维的非粒子${\cal {U}}$通过有效算符与标准模型场的相互作用。非粒子描述了非平凡标度不变扇区的低能物理。由于非粒子来自于SM物理之外,它们在SM规范群下转变为单线态是合理的。这极大地限制了可能的相互作用。我们分析了标量${\cal {U}}$,矢量${\cal {U}}$ $^μ$和旋量${\cal {U}}$ $^s$非粒子与SM场和衍生物的相互作用,直到4维。利用这些算符,我们讨论了在$e^+ e^-$对撞机上产生非粒子的不同特征和其它现象。通过观察产生截面的不同分布,可以区分在$e^+e^-$对撞机上产生的不同非粒子。

英文摘要:

We study interactions of unparticles ${\cal {U}}$ of dimension $d_{\cal {U}}$ due to Georgi with Standard Model (SM) fields through effective operators. The unparticles describe the low energy physics of a non-trivial scale invariant sector. Since unparticles come from beyond the SM physics, it is plausible that they transform as a singlet under the SM gauge group. This helps tremendously in limiting possible interactions. We analyze interactions of scalar ${\cal {U}}$, vector ${\cal {U}}$$^μ$ and spinor ${\cal {U}}$$^s$ unparticles with SM fields and derivatives up to dimension four. Using these operators, we discuss different features of producing unparticles at $e^+ e^-$ collider and other phenomenologies. It is possible to distinguish different unparticles produced at $e^+e^-$ collider by looking at various distributions of production cross sections.

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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