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<p>The amount of information propagated by an intermediate heavy particle exhibits characteristic features in inelastic scatterings with <i>n</i> ≥ 3 final particles. As the total energy increases, the entanglement entropy, between its decay products and other final particles, exhibits a universal sharp dip, suppressed by its small decay rate. This indicates an entanglement suppression from a low-energy effective theory to a channel dominated by an on-shell heavy particle. As demonstrations of these entanglement features, we study concrete models of 2 → 3 and 2 → 4 scatterings, which shed light on the entanglement structure beyond the area law derived for 2 → 2 scattering. In practice, these features may be probed by suitably marginalizing the phase-space distribution of final particles.</p>

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Entanglement features in scattering mediated by heavy particles

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年10月1日

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  • Chon Man Sou,
  • Yi Wang,
  • Xingkai Zhang

摘要

The amount of information propagated by an intermediate heavy particle exhibits characteristic features in inelastic scatterings with n ≥ 3 final particles. As the total energy increases, the entanglement entropy, between its decay products and other final particles, exhibits a universal sharp dip, suppressed by its small decay rate. This indicates an entanglement suppression from a low-energy effective theory to a channel dominated by an on-shell heavy particle. As demonstrations of these entanglement features, we study concrete models of 2 → 3 and 2 → 4 scatterings, which shed light on the entanglement structure beyond the area law derived for 2 → 2 scattering. In practice, these features may be probed by suitably marginalizing the phase-space distribution of final particles.