Relations Between Harmonic Sums in Massless QCD Calculations
✍ Scribed by J. Blümlein
- Book ID
- 106195047
- Publisher
- Springer Vienna
- Year
- 2005
- Tongue
- English
- Weight
- 67 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0177-7963
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📜 SIMILAR VOLUMES
We describe the structural relations between nested harmonic sums emerging in the description of physical single scale quantities up to the 3-loop level in renormalizable gauge field theories. These are weight w=6 harmonic sums. We identify universal basic functions which allow to describe a large c
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The semi-leptonic decay amplitudes of heavy A hyperons are calculated with sum rules in full QCD. The decay rate of the A¢ ~ AtP agrees in the errors with the experimental value. For the decay Ab --A~lP a substantial deviation from HQET is found in our approach.