Axion-Like Particles and Recent Observations of the Cosmic Infrared
  Background Radiation
  The CIBER collaboration released their first observational data of the Cosmic
IR background (CIB) radiation, which has significant excesses at around the
wavelength $\sim$ 1 $\mu$m compared to theoretically-inferred values. The
amount of the CIB radiation has a significant influence on the opaqueness of
the Universe for TeV gamma-rays emitted from distant sources such as AGNs. With
the value of CIB radiation reported by the CIBER experiment, through the
reaction of such TeV gamma-rays with the CIB photons, the TeV gamma-rays should
be significantly attenuated during propagation, which would lead to energy
spectra in disagreement with current observations of TeV gamma ray sources. In
this article, we discuss a possible resolution of this tension between the TeV
gamma-ray observations and the CIB data in terms of axion [or Axion-Like
Particles (ALPs)] that may increase the transparency of the Universe by the
anomaly-induced photon-axion mixing. We find a region in the parameter space of
the axion mass, $m_a \sim 7 \times 10^{-10} - 5 \times 10^{-8}$eV, and the
axion-photon coupling constant, $1.2 \times 10^{-11} {\rm GeV}^{-1} \lesssim
g_{a\gamma} \lesssim 8.8 \times 10^{-10} {\rm GeV}^{-1}$ that solves this
problem.
