  There have been vigorous research attempts to test various modified gravity
theories by usingphysics of the cosmic microwave background (CMB). Meanwhile,
symmetry breaking such as Higgsmechanism is one of the most important phenomena
in physics but there have been not so muchresearches to make them contact with
cosmological observations. In this article, with the CMBpower spectra we try to
distinguish two different scenarios of spontaneous symmetry breaking
inprimordial era of the universe. The first model is based on a broken
symmetric theory of gravity,which was suggested by A. Zee in 1979. The second
model is an application of Palatini formalismto the first model. Perturbation
equations are computed and they show differences originated fromthe property of
symmetry. Furthermore, it turns out that two models have different features
ofCMB power spectra with the same potential scale. This fact enables us to
verify distinct kinds ofprimordial symmetry breaking with CMB physics.
