Effects on CMB temperature power spectra for the different values of the model parameter α and B_s. In the left figure, the blue dashed, red solid, and green dotted-dashed lines are for B_s = 0.827, 0.727, 0.627, respectively; in the middle figure, the blue dashed, red solid, and green dotted-dashed lines are for α = 0.5, −0.0156, −0.5, respectively; in the right figure, the blue dashed, red solid, and green dotted-dashed lines are for B = 0.05, −0.0009, −0.05, respectively; the other relevant parameters are fixed with the mean values of CMB+JLA+CC as shown in Table 1.