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Títol:
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More nonperturbative corrections to the fine and hyperfine splitting in the heavy quarkorium
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Autor/a:
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Pineda, Antonio
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Altres autors:
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Universitat de Barcelona |
Abstract:
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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
(
Λ
4
QCD
/
m
3
α
2
s
)
has been overlooked. We calculate it in this paper. |
Matèries:
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-Partícules (Física nuclear) -Particles (Nuclear physics) |
Drets:
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(c) The American Physical Society, 1997
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Tipus de document:
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Article Article - Versió publicada |
Publicat per:
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Published for the American Physical Society by the American Institute of Physics
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