The U(1) problem is reconsidered from the point of view of the 1 N expansion. It is argued that various heuristic ideas about the η′ are valid from this point of view. Current algebra theorems, similar to soft π theorems, are derived for the η′. They are valid to lowest order in 1 N.
|Original language||English (US)|
|Number of pages||15|
|Journal||Nuclear Physics, Section B|
|State||Published - Sep 3 1979|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics