Observation of $\eta_{c}$ decay into $\Sigma^{+}\bar{\Sigma}^{-}$ and $\Xi^{-}\bar{\Xi}^{+}$ final states - INSPIRE

DataBETA

Observation of $\eta_{c}$ decay into $\Sigma^{+}\bar{\Sigma}^{-}$ and $\Xi^{-}\bar{\Xi}^{+}$ final states

BESIII

Collaboration

Oct, 2012

9 pages

Published in:

Phys.Rev.D 87 (2013) 1, 012003

Published: Jan 3, 2013

e-Print:

1210.2831 [hep-ex]

DOI:

10.1103/PhysRevD.87.012003

PDG:

{{\mathit \eta}_{{{c}}}{(1S)}}

\rightarrow

{{\mathit \Sigma}^{+}}{{\overline{\mathit \Sigma}}^{-}}

Experiments:

BEPC-BES-III

View in:

reference search6 citations

Citations per year

Abstract: (APS)

Using a data sample of 2.25×108 J/ψ events collected with the BESIII detector, we present the first observation of the decays of ηc mesons to Σ+Σ¯- and Ξ-Ξ¯+. The branching fractions are measured to be (2.11±0.28stat±0.18syst±0.50PDG)×10-3 and (0.89±0.16stat±0.08syst±0.21PDG)×10-3 for ηc→Σ+Σ¯- and Ξ-Ξ¯+, respectively. These branching fractions provide important information on the helicity selection rule in charmonium-decay processes.

Note:

17 pages, 8 figures

13.20.Gd
13.25.Gv
14.40.Pq
eta/c(2980): rare decay
helicity: selection rule
eta/c(2980): branching ratio: measured
BES
electron positron: annihilation
J/psi(3100): radiative decay
hyperon: pair production

References(27)

Figures(8)

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