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arXiv 0811.3972hep-phhep-th
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非对易时空中的粒子唯象学

Particle phenomenology on noncommutative spacetime

Anosh Joseph

摘要:

我们介绍了粒子唯象学的非对易时空称为Groenewold-Moyal平面。从$K^{0}-\bar{K}^{0}$系统的CPT破坏测量和$μ^+ - μ^-$的$g-2$差中得到了时空非对易性的长度尺度. $K^{0}-\bar{K}^{0}$系统提供了一个$10^{-32} \textrm{m}$量级的时空非对易性长度尺度上界,对应于$E \gtrsim 10^{16}\textrm{GeV}$量级的能量下界$E$。$μ^+ - μ^-$的$g-2$差将非对易性长度尺度限制为$10^{-20} \textrm{m}$的量级,对应于$E \gtrsim 10^{3}\textrm{GeV}$量级的较低能量界$E$。我们还提出了非对易时空中电子与核子在树水平上的电磁相互作用的唯象。我们证明了时空非对易性对核子的电荷和磁化强度分布的影响。电磁形状因子的分析性质也发生了变化,这可能会产生有趣的实验信号。

英文摘要:

We introduce particle phenomenology on the noncommutative spacetime called the Groenewold-Moyal plane. The length scale of spcetime noncommutativity is constrained from the CPT violation measurements in $K^{0}-\bar{K}^{0}$ system and $g-2$ difference of $μ^+ - μ^-$. The $K^{0}-\bar{K}^{0}$ system provides an upper bound on the length scale of spacetime noncommutativity of the order of $10^{-32} \textrm{m}$, corresponding to a lower energy bound $E$ of the order of $E \gtrsim 10^{16}\textrm{GeV}$. The $g-2$ difference of $μ^+ - μ^-$ constrains the noncommutativity length scale to be of the order of $10^{-20} \textrm{m}$, corresponding to a lower energy bound $E$ of the order of $E \gtrsim 10^{3}\textrm{GeV}$. We also present the phenomenology of the electromagnetic interaction of electrons and nucleons at the tree level in the noncommutative spacetime. We show that the distributions of charge and magnetization of nucleons are affected by spacetime noncommutativity. The analytic properties of electromagnetic form factors are also changed and it may give rise to interesting experimental signals.

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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