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arXiv 1408.4455hep-ph
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关于重子生成和$n \bar n$振荡

On Baryogenesis and $n \bar n$-Oscillations

Enrico Herrmann

摘要:

我们研究了一个简单的模型,其中色六重体标量在树水平上违反重子数,但不引起质子衰变。特别是,我们包括一个轻和两个重的六重体与$ΔB=2$重子数违反相互作用,诱导中子反中子振荡。这种设置也表明,通过在$10^{14}$ GeV附近的重六重标量的平衡衰变,与宇宙中观察到的重子不对称性的产生有着密切的联系。产生重子不对称性的标量场的大$SU(3)$色荷促使我们研究潜在的重要的洗出效应。我们数值求解了一组玻尔兹曼演化方程,并找到了成功的高尺度重子生成所施加的可用模型参数的限制。结合我们的新的数值计算结果与$n\bar n$振荡预测和对撞机限制轻六重奏重子,我们确定参数区域,该模型可以探测当前和未来的实验。

英文摘要:

We study a simple model where color sextet scalars violate baryon number at tree level but do not give rise to proton decay. In particular, we include one light and two heavy sextets with $ΔB=2$ baryon number violating interactions that induce neutron anti-neutron oscillations. This setup also suggests an intimate connection to the generation of the observed baryon asymmetry in the Universe via the out of equilibrium decay of the heavy sextet scalars at around $10^{14}$ GeV. The large $SU(3)$-color charges of the scalar fields involved in generating the baryon asymmetry motivate us to study potentially significant washout effects. We numerically solve a set of Boltzmann evolution equations and find restrictions on the available model parameters imposed by successful high scale baryogenesis. Combining our new numerical results for baryogenesis with $n\bar n$-oscillation predictions and collider limits on the light sextet, we identify parameter regions where this model can be probed by current and future experiments.

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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