论文标题
从无质粒子梁的衰减中产生巨大的玻色子
Production of massive bosons from the decay of a massless particle beam
论文作者
论文摘要
采用两个相互作用的标量玩具模型，具有相互作用项$ gϕχ^2 $，我们研究了$χ$粒子的产生来自渐近且高度占用的$ ϕ $颗粒的衰减。我们进行了来自参数谐振不稳定性的非扰动分析，并研究了从光束中的无质量$ ϕ $粒子衰减产生的大量$χ$颗粒的可能性。尽管此过程不存在于扰动分析中，但我们的非扰动方法允许在某些条件下进行。对于动量$ p $的梁粒子和生产的质量$m_χ$，我们发现如果梁的能量密度超过不稳定性阈值$ p^2m_χ^4/（2g^2）$，则允许衰减。我们还提供了最早的自发衰减率的分析表达。
Taking a two interacting scalar toy model with interaction term $gϕχ^2$, we study the production of $χ$ particles coming from the decay of an asymptotic and highly occupied beam of $ϕ$ particles. We perform a nonperturbative analysis coming from parametric resonant instabilities and investigate the possibility that massive $χ$ particles are produced from decays of massless $ϕ$ particles from the beam. Although this process is not present in a perturbative analysis, our nonperturbative approach allows it to happen under certain conditions. For a momentum $p$ of the beam particles and a mass $m_χ$ of the produced ones, we find that the decay is allowed if the energy density of the beam exceeds the instability threshold $p^2 m_χ^4/(2g^2)$. We also provide an analytical expression for the spontaneous decay rate at the earliest time.
