Nishijima Kazuhiko
Proc Jpn Acad Ser B Phys Biol Sci. 2008;84(9):363-73. doi: 10.2183/pjab.84.363.
The concept of strangeness emerged from the low energy phenomenology before the entry of quarks in particle physics. The connection between strangeness and isospin is rather accidental and loose and we recognize later that the definition of strangeness is model-dependent. Indeed, in Gell-Mann's triplet quark model we realize that there is a simple alternative representation of strangeness. When the concept of generations is incorporated into the quark model we find that only the second alternative version of strangeness remains meaningful, whereas the original one does no longer keep its significance.
奇异数的概念出现在粒子物理学引入夸克之前的低能现象学中。奇异数与同位旋之间的联系相当偶然且松散，后来我们认识到奇异数的定义依赖于模型。实际上，在盖尔曼的三重态夸克模型中，我们意识到存在奇异数的一种简单替代表示。当世代的概念被纳入夸克模型时，我们发现只有奇异数的第二种替代版本仍然有意义，而原来的版本不再具有其重要性。
