Search for the radiative transitions $\psi(3770)\to\gamma\eta_c$ and $\gamma\eta_c(2S)$ - INSPIRE

DataBETA

Search for the radiative transitions $\psi(3770)\to\gamma\eta_c$ and $\gamma\eta_c(2S)$

BESIII

Collaboration

May 13, 2014

10 pages

Published in:

Phys.Rev.D 89 (2014) 11, 112005

Published: Jun 18, 2014

e-Print:

1405.3190 [hep-ex]

DOI:

10.1103/PhysRevD.89.112005

PDG:

{{\mathit \psi}{(3770)}}

\rightarrow

{{\mathit \gamma}}{{\mathit \eta}_{{{c}}}}

Experiments:

BEPC-BES-III

View in:

ADS Abstract Service

reference search7 citations

Citations per year

Abstract: (APS)

By using a 2.92 fb-1 data sample taken at s=3.773 GeV with the BESIII detector operating at the BEPCII collider, we search for the radiative transitions ψ(3770)→γηc and γηc(2S) through the hadronic decays ηc(ηc(2S))→KS0K±π∓. No significant excess of signal events above background is observed. We set upper limits at a 90% confidence level for the product branching fractions to be B(ψ(3770)→γηc)×B(ηc→KS0K±π∓)<1.6×10-5 and B(ψ(3770)→γηc(2S))×B(ηc(2S)→KS0K±π∓)<5.6×10-6. Combining our result with world-average values of B(ηc(ηc(2S))→KS0K±π∓), we find the branching fractions B(ψ(3770)→γηc)<6.8×10-4 and B(ψ(3770)→γηc(2S))<2.0×10-3 at a 90% confidence level.

Note:

10 pages, 4 figures

13.25.Gv
13.40.Hq
14.40.Pq
psi(3770): radiative decay
eta/c(2980): hadronic decay
Beijing Stor
BES
electron positron: annihilation
eta/c(3590): hadronic decay
psi(3770): branching ratio: upper limit

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