Cancellation of Sudakov logarithms in radiative decays of quarkonia
We study infrared QCD effects in radiative quarkonia decays. We examine the endpoint region z→1 of the photon spectrum. We point out a cancellation mechanism for the corrections in αsnlnm(1-z), m≤2n, in the short-distance coefficient for the color-singlet Fock state in the quarkonium. The cancellati...
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| Format: | Journal article |
| Language: | English |
| Published: |
2001
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