2009 Fiscal Year Final Research Report
A Possible Lorentz Violation and Its Impact on Cosmology
| Project/Area Number |
18540262
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Kyoto University |
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Principal Investigator |
SODA Jiro Kyoto University, 大学院・理学研究科, 准教授 (00222076)
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| Project Period (FY) |
2006 – 2009
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| Keywords | 宇宙論 |
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| Research Abstract |
Due to developments of observations, it becomes important to check the fundamental principle such as Lorentz invariance. Moreover, precision cosmology urged us to study theoretical fine structure. However small it is, it is worth exploring in detail. Based on this motivation, we have studied the impact of Lorentz violation on cosmology. We found an anisotropic inflationary scenario where Lorentz invariance is spontaneously broken. We also formulated cosmological perturbation theory in this background and succeeded in making predictions for various observables relevant to future observations of cosmic microwave background radiation.
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