Overlapping resonances in multichannel reactions
Overlapping resonances in multichannel reactions
复制标题
多通道反应中的重叠共振
DOI：
--
复制
发表时间：
1998
期刊：
影响因子：
--
通讯作者：
V. Henner
中科院分区：
文献类型：
--
作者：
T. Belozerova;V. Henner
回顾了已有的构造显式共振的酉S矩阵的方法。当|E r i−E r j|∼Γri+Γr j时，这些方法可用于描述具有相同量子数的共振组ri。详细研究了这些方法之间的关系。在共振物理和核物理的许多问题中，用Breit-Wigner公式描述激发态是最常用的。在这篇综述中，我们着重于构造一个酉化的、T不变的、多道的、多共振的Breit-Wigner型S矩阵。作为这些方法的实际应用，我们研究了矢量ρ和ω介子的激发谱。讨论了将其解释为夸克-反夸克激发态的可能性。
The existing methods of constructing an explicitly resonance, unitary S matrix are reviewed. These methods can be used for describing groups of resonances r i with identical quantum numbers in the case where they overlap, when |E r i −E r j |∼Γ r i +Γ r j . The relation between these methods is studied in detail. The description of excited states by means of the Breit–Wigner formulas is used most often in many problems of resonance physics and nuclear physics, and in this review we focus on the construction of a unitary, T -invariant, multichannel, multiresonance S matrix of the Breit–Wigner type. As a real application of these methods we study the excitation spectrum of vector ρ and ω mesons. The possibility of interpreting these as quark–antiquark excited states is discussed.