# name
More nonperturbative corrections to the fine and hyperfine splitting in the heavy quarkorium

# metadata.dc.description.abstract[].value
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.

# metadata.dc.publisher[].value
Published for the American Physical Society by the American Institute of Physics

# metadata.dc.relation.isformatof[].value
Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevD.55.407

# metadata.dc.source[].value
Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
More nonperturbative corrections to the fine and hyperfine splitting in the heavy quarkorium