论文标题
毕竟，最奇怪的非怪物介子并不那么奇怪
The strangest non-strange meson is not so strange after all
论文作者
论文摘要
广泛的非震动介子$ f_0 $（500）被认为是非生物界的共振。通常认为，如果共振广泛，则几乎无法通过Breit-Wigner形式描述。我们在这里展示这对宽阔的Z玻色子也不是真的，也不适合较窄的$δ（1232）$，并解释为什么$ f_0 $（500）完全适合它们。它们之间的关键差异归结为单个参数：我们从阈值中看到共振极的角度，该阈值解释了背景，残基相以及极点和Breit-Wigner参数之间的差异。
The broad non-strange meson $f_0$(500) is considered to be a non-Breit-Wigner resonance. It is generally assumed that if a resonance is broad it can hardly be described by a Breit-Wigner form. We show here that is not true neither for the broad Z boson, nor for the much narrower $Δ(1232)$, and explain why the $f_0$(500) fits with them perfectly. Key differences between them boil down to a single parameter: the angle at which we see the resonance pole from the threshold, which explains the background, the residue phase, and the difference between the pole and Breit-Wigner parameters.
