"Reheating, Gravitinos and the Matter-Antimatter Asymmetry of the Universe"

The early universe went through a phase of accelerated expansion called inflation.  After inflation the field driving the expansion decays, its decay products thermalise, and the universe heats up (or, reheats). The thermal universe now contains all the known particles and dark matter particles.  Gravitinos are supersymmetric particles that are also produced and their presence has very adverse cosmological consequences.  However mechanisms to suppress gravitino production make it difficult to produce the observed matter-antimatter asymmetry of the universe.  We discuss

various scenarios of gravitino production and how their abundance may be suppressed.

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