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Higher η c( nS) and η b( nS) mesons.
- Source :
- Physics of Atomic Nuclei; Oct2007, Vol. 70 Issue 10, p1764-1772, 9p, 8 Charts
- Publication Year :
- 2007
-
Abstract
- The hyperfine splittings in heavy quarkonia are studied in a model-independent way using experimental data on dielectron widths. Relativistic correlations are taken into account together with the smearing of spin-spin interaction. The radius of smearing is fixed by known G/ ψ−η <subscript>c</subscript>(1 S), ψ(2 S)− η <subscript>c</subscript>′(2 S) splittings, which appears to be small, r <subscript>ss</subscript> ≅ 0.06 fm. Nevertheless, even with such a small radius, substantial suppression of hyperfine splittings (∼50%) is observed in bottomonium. For nS b $$\bar b$$ states ( n = 1, 2, ..., 6), our predicted splittings (in MeV) are 28, 12, 10, 5, 6, 3. For the 3 S and 4 S charmonium states, the splittings 16(2) and 12(4) MeV are obtained. [ABSTRACT FROM AUTHOR]
- Subjects :
- HYPERFINE interactions
STATISTICAL correlation
MESONS
CHARMONIUM
HYPERFINE structure
Subjects
Details
- Language :
- English
- ISSN :
- 10637788
- Volume :
- 70
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Physics of Atomic Nuclei
- Publication Type :
- Academic Journal
- Accession number :
- 27236277
- Full Text :
- https://doi.org/10.1134/S1063778807100134