Decays Caused by Weak and Strong Forces
由弱力和强力引起的衰变
The strong interaction and weak interaction can be compared in a set of particle decays which yield the same final products:
强相互作用和弱相互作用可以在一组粒子衰变中进行比较，这些衰变产生相同的最终产物：
The extraordinary difference of 13 orders of magnitude in the lifetimes comes from the fact that the sigma decay does not conserve strangeness and therefore can proceed only by the weak interaction:
寿命相差13个数量级的特殊性来自于sigma衰变不守恒 strangeness，因此只能通过弱相互作用进行：
The lifetime of a decay is proportional to the inverse square of the coupling constant between the initial and final products, and since the final products are identical, the difference in lifetime must come from the difference in coupling constants. The coupling constant ratio can then be estimated for this situation:
衰变的寿命与初始产物和最终产物之间的耦合常数的倒数平方成正比，由于最终产物是相同的，寿命的差异必须来自耦合常数的差异。因此可以对这种情况估计耦合常数的比值：
.| Particle conservation laws
粒子守恒定律 |
由于强相互作用耦合常数在这些衰变的能量范围内约为1，我们可以估计弱相互作用耦合常数的值在范围内：
Particle concepts
Reference
Rohlf
Ch. 18
索引 质点 概念 参考 Rohlf 第18章
HyperPhysics ***** 量子物理 ***** 粒子
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