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## Production of spin 3/2 particles from vacuum fluctuations

Research output: Contribution to journalJournal article

Published

Journal publication date 21/02/2000 Physical Review Letters 8 84 4 1655-1658 English

### Abstract

We study the production of spin 3/2 particles in homogeneous scalar and gravitational backgrounds from the mode-mixing Bogolyubov method. Considering only helicity $\pm 3/2$ 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 supergravity inflationary model and calculate the spectrum of gravitinos created during preheating at the end of inflation.

### Bibliographic note

© 2000 The American Physical Society 4 pages, RevTeX, 1 figure. New comments and references added. Final version to appear in Phys.Rev.Lett