Recent Developments In Heavy Quarkonium Physics
Abstract
Recent developments in heavy quarknoium physics are reviewed in brief, including (i) nonrelativistic QCD(NRQCD), (ii) the importance of color-octet (QQ) components in the decay and the production of a physical heavy quarkonium state, (iii) limitation of the NRQCD factorization and (iv) the double humps in the ππ spectrum in the decay (3S) (1S) ππ.
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