Why must supersymmetry be broken during the inflation in supergravity models? How does adding supersymmetry to power-law or Starobinsky models spoil inflation?
And is breaking of SUSY needed for both F-term and D-term inflations?
Why must supersymmetry be broken during the inflation in supergravity models? How does adding supersymmetry to power-law or Starobinsky models spoil inflation?
And is breaking of SUSY needed for both F-term and D-term inflations?
For inflation we need to have a positive energy density $V>0$, which drives inflation. If [the VEV of] the F-term potential $V_F>0$, then we necessarily have F-term SUSY breaking. (Text in [] should be removed, see discussion below.)
psm