出典:Wiktionary
出典:『Wiktionary』 (2016/12/30 08:16 UTC 版)
bottomness (uncountable)
出典:Wikipedia
出典:『Wikipedia』 (2010/10/31 22:34 UTC 版)
In physics, bottomness (symbol B′) also called beauty, is a flavour quantum number reflecting the difference between the number of bottom antiquarks (nb) and the number of bottom quarks (nb) that are present in a particle: