Retardation corrections to the quarkonium hyperfine separations

N. Brambilla; G. M. Prosperi

doi:10.1016/0370-2693(92)90829-S

Retardation corrections to the quarkonium hyperfine separations

N. Brambilla, G. M. Prosperi

University of Milan

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	213-218
Number of pages	6
Journal	Physics Letters B
Volume	296
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(92)90829-S
State	Published - 10 Dec 1992
Externally published	Yes

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AB - 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.

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Retardation corrections to the quarkonium hyperfine separations

Abstract

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