论文标题
N-Delta状态的离心效应
Centrifugal effects in N-Delta states
论文作者
论文摘要
最近有人指出，在两个巴里元$nδ$或$δδ$系统中，由于两个重子的相对动能，该状态的宽度大大降低了，因为可用于开创性衰减的颗粒的内部能量较小。对于非零轨道角动量，此效果成为状态依赖性。同样，$nδ$能量的实际部分也可以从离心屏障的贡献中，从而导致旋转式弥散状态。显然，这些状态可能像isospin One Dibaryons一样具有解释。对此进行了直接和显式计算，其中包含显示的耦合状态波函数的一些细节。有了这些排斥效应的有限期望值，可能有可能定义$nδ$状态的状态依赖性有效阈值，而这些阈值又可以表现出像行为一样的共鸣。
Recently it has been pointed out that in the two-baryon $NΔ$ or $ΔΔ$ system the width of the state is greatly diminished due to the relative kinetic energy of the two baryons, since the internal energy of the particles, available for pionic decay, is smaller. For nonzero orbital angular momenta this effect becomes state dependent. Also the real part of the $NΔ$ energy can get contribution from the centrifugal barrier leading to rotational series of diffuse states. Obviously, these states may have an interpretation as isospin one dibaryons. Direct and explicit calculations for this are presented with some details of the coupled state wave functions displayed. With finite expectation values of these repulsive effects it may be possible to define state dependent effective thresholds for $NΔ$ states and these, in turn, can show resonant like behavior.
