Decay of Scalar Condensation in Quantum Field Theory

Details Decay of Scalar Condensation in Quantum Field Theory Decay of Scalar Condensation in Quantum Field Theory

2007-09-27

arxiv.org/abs/0709.4338v1

Phys.Rev.D77:045014,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 3 figures

Scientific paper

10.1103/PhysRevD.77.045014

We consider decay processes of scalar-field condensation in the framework of well-established quantum field theory. We postulate that the quantum state corresponding to the scalar-field condensation is so-called coherent state with discussing the validity of such a treatment. We show that, by using the unitarity relation of the scattering matrix, decay rate of the coherent state is systematically calculated. We apply our procedure to derive explicit formulae of decay rates for two cases: (i) we study the case where the scalar condensation decays into a pair of scalar particles and show that our formalism reproduces the results obtained from the parametric-resonance analysis, and (ii) we also calculate the decay rate when the coherent state decays via anomaly.

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