Retardation corrections to the quarkonium hyperfine separations

The lowest order retardation corrections to the hyperfine separations are evaluated for some charmonium and bottomonium states under the usual assumption of a purely scalar Bethe-Salpeter confinement kernel. The form of the kernel and the parameters involved are the same used in a previous paper dev...

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Bibliographic Details
Published in:Physics letters. B 1992-12, Vol.296 (1), p.213-218
Main Authors: Brambilla, N., Prosperi, G.M.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Mesons
Physics
Properties of specific particles
The physics of elementary particles and fields
Citations: Items that this one cites
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Summary:The lowest order retardation corrections to the hyperfine separations are evaluated for some charmonium and bottomonium states under the usual assumption of a purely scalar Bethe-Salpeter confinement kernel. The form of the kernel and the parameters involved are the same used in a previous paper devoted to the evaluation of the leading spin-independent retardation corrections. Only the 1S and 2S states are considered. The corrections turn out to be about −30 MeV for the 1S separation and a few MeV for the 2S one.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(92)90829-S