Figure 5

Figure 5: The relation between the inflaton mass m ∕M 4 (M ≡ M 4 p) and the brane tension 4 1∕4 (λ∕M 4) necessary to satisfy the COBE constraints. The straight line is the approximation used in Equation (220View Equation), which at high energies is in excellent agreement with the exact solution, evaluated numerically in slow-roll. (Figure taken from [308].)