Quantum Scattering and Classical Solutions

Details Quantum Scattering and Classical Solutions Quantum Scattering and Classical Solutions

Publishing date

1994-06-06

URL

arxiv.org/abs/hep-ph/9406234v1

Science

Physics

Field

High Energy Physics

SubField

High Energy Physics - Phenomenology

Additional info

17 pages, uses latex and pictex

Type

Scientific paper

Abstract

I discuss a formalism for computing quantum scattering amplitudes using a semiclassical expansion of a functional integral representation for the S-matrix. The classical background for the expansion is determined by solving the equations of motion subject to nontrivial boundary conditions determined by the initial and final quantum states. The formalism is designed to accommodate intrinsically nonperturbative processes such as baryon number violation, quantum tunneling and multiparticle scattering. It appears to yield a controlled small coupling expansion even at asymptotically high energies where instanton methods fail. (Contribution to proceedings for Sintra '94 NATO Workshop on Electroweak Physics and the Early Universe)

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