Change Of The Vacuum Outside A Pion-Condensed Nucleus

PHYSICAL REVIEW LETTERS（1984）

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摘要

The vacuum perturbation produced outside a nucleus which is in the pion-condensed phase is considered within the chiral $\ensuremath{\sigma}$ model. It is shown that this leads to a quasi long-range pion field outside the nucleus.

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关键词

perturbation theory,mathematical model,scalar field,boundary condition,symmetry breaking,mathematical models,boundary conditions,matter,elementary particles,nuclear matter

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