Abstract
QCD sum rules induced by the current GμνaḠμνa constructed from gluon field operators are derived. Saturating the sum rules by η′ rough estimates for the η′ mass and its residue are found. The difference between the η′ and typical quark states such as ρ{variant} is noted. Breaking of the opeator expansion by the instanton effects is discussed.
Original language | English (US) |
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Pages (from-to) | 347-350 |
Number of pages | 4 |
Journal | Physics Letters B |
Volume | 86 |
Issue number | 3-4 |
DOIs | |
State | Published - Oct 8 1979 |