PT Journal
AU del Rio, A
   Navarro-Salas, J
TI Spacetime correlators of perturbations in slow-roll de Sitter inflation
SO Physical Review D
JI Phys. Rev. D
PY 2014
BP 084037
EP 7pp
VL 89
IS 8
DI 10.1103/PhysRevD.89.084037
LA English
AB Two-point correlators and self-correlators of primordial perturbations in quasi-de Sitter spacetime backgrounds are considered. For large separations two-point correlators exhibit nearly scale invariance, while for short distances self-correlators need standard renormalization. We study the deformation of two-point correlators to smoothly match the self-correlators at coincidence. The corresponding angular power spectrum is evaluated in the Sachs-Wolfe regime of low multipoles. Scale invariance is maintained, but the amplitude of C(l)could change in a nontrivial way.
ER