普朗克尺度下的洛仑兹对称性破坏,宇宙学和超光速粒子
Lorentz symmetry violation at Planck scale, cosmology and superluminal particles
摘要:
虽然洛伦兹对称性在低能下已经得到了很好的检验,但它在高能下的有效性还没有得到很好的证实。如果洛伦兹对称破坏(LSV)是能量依赖的(例如$\propto E^2$),它可以在普朗克尺度下为1阶,在GeV或更低的尺度下无法检测。类似地,具有正质量和正能量的超光速粒子(超慢子)可以存在,并且是物质的最终组成部分。我们讨论了这样一种情况的一些宇宙学后果,以及可能的实验测试。
英文摘要:
Although Lorentz symmetry has been tested at low energy with extremely good accuracy, its validity at very high energy is much less well established. If Lorentz symmetry violation (LSV) is energy-dependent (e.g. $\propto E^2$), it can be of order 1 at Planck scale and undetectable at GeV scale or below. Similarly, superluminal particles with positive mass and energy (superbradyons) can exist and be the ultimate building blocks of matter. We discuss a few cosmological consequences of such a scenario, as well as possible experimental tests.
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