Samenvatting
Using a data sample of 2.25 x 10(8) J/psi events collected with the BESIII detector, we present the first observation of the decays of eta(c) mesons to Sigma(+)(Sigma) over bar (-) and (sic)(-)(+) .The branching fractions are measured to be (2.11 +/- 0.28(stat) +/- 0.18(syst) +/- 0.50(PDG)) x 10(-3) and (0.89 +/- 0.16(stat) +/- 0.08(syst) +/- 0.21(PDG)) x 10(-3) for eta(c) -> Sigma(+)(Sigma) over bar (-) and (sic)(-)(+) , respectively. These branching fractions provide important information on the helicity selection rule in charmonium- decay processes. DOI: 10.1103/PhysRevD.87.012003
Originele taal-2 | English |
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Artikelnummer | 012003 |
Aantal pagina's | 9 |
Tijdschrift | Physical Review D |
Volume | 87 |
Nummer van het tijdschrift | 1 |
DOI's | |
Status | Published - 3-jan.-2013 |