出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/03/26 13:04 UTC 版)
In particle physics, a B-factory is a collider-based scientific machine designed to produce a large number (of the order of 109) of B mesons and analyze their properties. The tau leptons and D mesons are also copiously produced at B-factories, which allows precise studies of their properties.