Speaker: Katsuki Aoki (Waseda Univ.)
Title: condensate of massive graviton as dark matter
We study coherently oscillating massive gravitons in the ghost-free bigravity theory. This coherent field could be interpreted as a "condensate" of the massive gravitons, or it is regarded as a spacetime anisotropy from the geometrical point of view. We present that the condensate of massive graviton (or the spacetime anisotropy) is a viable candidate for dark matter. We also discuss a production of the spacetime anisotropy and find that the extragalactic magnetic field of a primordial origin can yield a sufficient amount of dark matter.

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Last-modified: 2017-07-07 (金) 13:57:24 (253d)