Quantum back-reaction of the superpartners in a large-N supersymmetric hybrid model
Abstract
We study the supersymmetric hybrid model near and after the end of inflation. As usual, we reduce the model to a purely scalar hybrid model on the level of the classical fields. But on the level of quantum fluctuations and their back-reaction we take into account all superpartners of the waterfall field in a large-N approximation. The evolution after slow roll displays two phases with a different characteristic behaviour of the classical and fluctuation fields. We find that the fluctuations of the pseudoscalar superpartner are of particular importance in the late time phase. The motion of the waterfall field towards its classical expectation value is found to be very slow and suggests a rather flat potential and a stochastic force.
- Publication:
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Journal of Cosmology and Astroparticle Physics
- Pub Date:
- June 2007
- DOI:
- 10.1088/1475-7516/2007/06/004
- arXiv:
- arXiv:hep-th/0702009
- Bibcode:
- 2007JCAP...06..004B
- Keywords:
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- High Energy Physics - Theory;
- Astrophysics;
- High Energy Physics - Phenomenology
- E-Print:
- 37 pages 19 figures