| Budget Amount *help |
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2017: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2015: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
In massive gravity, the absence of a ghost in a helicity 0 mode is necessary for the stability of the theory. In order to clarify this feature, as a first step, we began with a point particle theory and obtained the generic condition for the absence of a ghost associated with higher derivative terms. We also showed that the equation of motion for a helicity 0 mode in a massive gravity with a general reference metric remains second order and hence that it does not lead to the ghost instability.
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