Observational constraints on particle production during inflation

  title={Observational constraints on particle production during inflation},
  author={\Oystein Elgar\oy and Steen Hannestad and Troels Haugb\olle},
Resonant particle production, along with many other physical processes which change the effective equation of state (EOS) during inflation, introduces a feature in the primordial power spectrum which in many models has a step-like shape. We calculate observational constraints on resonant particle production, parametrized in the form of an effective step height, N eff and location in k-space, k break. Combining data from the cosmic microwave background and the 2dF Galaxy Redshift Survey yields… CONTINUE READING

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