Production of spin 3/2 particles from vacuum fluctuations
We study the production of spin 3/2 particles in homogeneous scalar and gravitational backgrounds using the mode-mixing Bogolyubov method. Considering only the helicity +/-3/2 states, we can reduce the problem to a standard Dirac fermion calculation and apply the standard techniques in a straightforward way. As an example we consider a specific supergravity inflationary model and calculate the spectrum of gravitinos created during preheating at the end of inflation.
Maroto
AL
Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom.
Mazumdar
A