拉姆斯菲尔德强子
Rumsfeld Hadrons
摘要：
唐纳德·拉姆斯菲尔德在试图为不可原谅的行为开脱时曾说过一句名言："有些事情我们知道我们知道;有些事情我们知道我们不知道;还有一些事情我们不知道我们不知道”。最近发现的具有重味道的强子就属于这一类。当然，第三类问题最令人担忧，但前两类问题的教训可能有助于解决第三类问题。
英文摘要：
Donald Rumsfeld, in attempting to excuse the inexcusable, once (in)famously said that ``there are things that we know we know; there are things that we know we don't know; and then there are things that we don't know that we don't know". Recent discoveries about hadrons with heavy flavours fall into those categories. It is of course the third category that is the most tantalising, but lessons from the first two may help resolve the third.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
