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Can decaying particle explain cosmic infrared background excess?

Kohri, Kazunori; Nakayama, Kazunori; Moroi, Takeo

Recently the CIBER experiment measured the diffuse cosmic infrared background (CIB) flux and claimed an excess compared with integrated emission from galaxies. We show that the CIB spectrum can be fitted by the additional photons produced by the decay of a new particle. However, it also contributes too much to the anisotropy of the CIB, which is i…