More nonperturbative corrections to the fine and hyperfine splitting in heavy quarkonium
Open Access
- 1 January 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 55 (1) , 407-410
- https://doi.org/10.1103/physrevd.55.407
Abstract
Leading nonperturbative effects to fine and hyperfine splittings were calculated some time ago. Recently, they have been used in order to obtain realistic numerical results for the lower levels in bottomonium systems. We point out that a contribution of the same order O(ΛQCD4/m3αs2) has been overlooked. We calculate it in this paper.Keywords
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