THE LIGHT QUARK CURRENT-MASS RATIOS AND η—η′ MIXING
- 10 March 1990
- journal article
- Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters A
- Vol. 5 (6) , 391-397
- https://doi.org/10.1142/s0217732390000457
Abstract
Chiral corrections to the Weinberg quark current-mass ratios mu/md=0.55 and ms/md=20.1 are analysed in the large N limit, N being the number of colors. A consistent derivation of the η—η′ mixing excludes the possibility of a massless up quark and implies the second-order values mu/md ≃ 0.66 and ms/md ≈ 17.7.Keywords
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