论文标题
不稳定粒子的质量和宽度
Mass and width of an unstable particle
论文作者
论文摘要
我们表明，不稳定粒子的质量和宽度是由杆子在复杂能平面中精确定义的，$μ= m - （i/2）γ$，通过粒子的衰减速率和质量为$ m $，并带有振荡频率，通过识别宽度$γ$。我们发现，物理$ z $玻色子质量比其引用的价值低26 meV，而物理$ W $ boson Mass在下面占20 meV。我们还阐明了用于描述共鸣的各种Breit-Wigner公式。
We show that the mass and width of an unstable particle are precisely defined by the pole in the complex energy plane, $μ= m - (i/2)Γ$, by identifying the width, $Γ$, with the particle's decay rate and the mass, $m$, with the oscillatory frequency. We find that the physical $Z$ boson mass lies 26 MeV below its quoted value, while the physical $W$ boson mass lies 20 MeV below. We also clarify the various Breit-Wigner formulae that are used to describe a resonance.
