零程相互作用下相对论散射中Wigner因果关系界的超越
Surpassing Wigner's causality bound in relativistic scattering with zero-range interaction
摘要：
结果表明，相对论性零程势散射超越了Wigner的因果性界，但与因果性是一致的。相对论理论还显示了更丰富的解析结构，例如$K$-矩阵极点必然伴随着束缚态解。这些结果的有效场论的核力的影响进行了简要的考虑。
英文摘要：
It is shown that the relativistic zero-range potential scattering surpasses Wigner's causality bound, while being consistent with causality. The relativistic theory shows in addition a richer analytic structure, such as a $K$-matrix pole necessarily accompanying the bound-state solution. Implications of these results for the effective-field theory of nuclear forces are briefly considered.
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