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How parametric resonance mechanism follows quench mechanism in disoriented chiral condensate

S. Maedan
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Abstract

We show how parametric resonance mechanism follows quench mechanism in the classical linear sigma model. The parametric resonance amplifies long wavelength modes of the pion for more than $10 fm/c$. The shifting from the quench mechanism to the parametric resonance mechanism is described by a time dependent quantity. After the quench mechanism is over, that quantity has an oscillating part, which causes the parametric resonance. Since its frequency is $2 m_π~(m_π$ : pion mass), very long wavelength modes such as k = 40 MeV of the pion are amplified by the parametric resonance.

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S. Maedan. 2001-04-25. How parametric resonance mechanism follows quench mechanism in disoriented chiral condensate. https://doi.org/10.1016/s0370-2693(01)00697-9

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