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Higher η c( nS) and η b( nS) mesons.

Authors :
Badalian, A. M.
Bakker, B. L. G.
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]

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