Measurement of $\mathcal B(\psi(3770)\to\gamma \chi_{c1})$ and search for $\psi(3770)\to\gamma \chi_{c2}$ - INSPIRE

DataBETA

Measurement of $\mathcal B(\psi(3770)\to\gamma \chi_{c1})$ and search for $\psi(3770)\to\gamma \chi_{c2}$

BESIII

Collaboration

•

M. Ablikim
(
- Beijing, Inst. High Energy Phys.
)

Apr 28, 2015

9 pages

Published in:

Phys.Rev.D 91 (2015) 9, 092009

Published: May 26, 2015

e-Print:

1504.07450 [hep-ex]

DOI:

10.1103/PhysRevD.91.092009

PDG:

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

\rightarrow

{{\mathit \gamma}}{{\mathit \chi}_{{{c1}}}}

Experiments:

BEPC-BES-III

View in:

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Abstract: (APS)

We report a measurement of the branching fraction for ψ(3770)→γχc1 and search for the transition ψ(3770)→γχc2 based on 2.92 fb-1 of e+e- data accumulated at s=3.773 GeV with the BESIII detector at the BEPCII collider. We measure B(ψ(3770)→γχc1)=(2.48±0.15±0.23)×10-3, which is the most precise measurement to date. The upper limit on the branching fraction of ψ(3770)→γχc2 at a 90% confidence level is B(ψ(3770)→γχc2)<0.64×10-3. The corresponding partial widths are Γ(ψ(3770)→γχc1)=(67.5±4.1±6.7) keV and Γ(ψ(3770)→γχc2)<17.4 keV.

Note:

Submitted to PRD

14.40.Pq
13.20.Gd
experimental results
psi(3770): branching ratio: measured
B: branching ratio: measured
precision measurement
Beijing Stor
BES
psi(3770): radiative decay
statistical analysis

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