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Hyperfine splitting of quarkonium

descriptionPublicationkeyboard_double_arrow_right Article 01 Jul 1985Publisher:American Physical Society (APS)Journal:Physical Review D, volume 32, pages 232-236 (issn: 0556-2821,

Authors: Keiji Igi; Seiji Ono;

doi: 10.1103/physrevd.32.232

pmid: 9956000

Hyperfine splitting of quarkonium

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Abstract

Using a QCD-motivated model we show that (M( /sup 3/S/sub 1/))/sup 2/-(M( /sup 1/S/sub 0/ ))/sup 2/ is nearly constant for all quarkonium states. We find that the acceptable range of the QCD scale parameter to explain the weak quark-mass dependence of (M( /sup 3/S/sub 1/))/sup 2/-(M( /sup 1/S/sub 0/ ))/sup 2/ is ..lambda.. = 140 +- 60 MeV.

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University of Tokyo
Japan

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