Anisotropic power spectrum and the observed low-l power in PLANCK CMB
  data
  In this work, we study a direction dependent power spectrum in anisotropic
Finsler space-time. We use this direction dependent power spectrum to address
the low-l power observed in WMAP and PLANCK data. The angular power spectrum of
the temperature fluctuations has a lower amplitude in comparison to the
$\Lambda$CDM model in the multipole range l = 2-40. Our theoretical model gives
a correction to the isotropic angular power spectrum $C^{TT}_l$ due to the
breaking of the rotational invariance of the primordial power spectrum. We
estimate best-fit model parameters along with the six $\Lambda$CDM cosmological
parameters using PLANCK likelihood code in CosmoMC software. We see that this
modified angular power spectrum fits the CMB temperature data in the multipole
range l=2-10 to a good extent but fails for the whole multipole range l = 2-40.
