New measurements of $\upsilon_{1S}$ decays to charmonium final states - INSPIRE

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New measurements of $\upsilon_{1S}$ decays to charmonium final states

CLEO

Collaboration

•

Roy A. Briere
(
- Carnegie Mellon U.
)

Jul, 2004

27 pages

Published in:

Phys.Rev.D 70 (2004) 072001

e-Print:

hep-ex/0407030 [hep-ex]

DOI:

10.1103/PhysRevD.70.072001

PDG:

{{\mathit \Upsilon}{(1S)}}

\rightarrow

{{\mathit J / \psi}{(1S)}}

Report number:

CLNS-04-1883,
CLEO-04-08

Experiments:

CESR-CLEO-III

View in:

ADS Abstract Service

reference search37 citations

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Abstract:

Using substantially larger data samples collected by the CLEO III detector, we report on new measurements of the decays of Upsilon(1S) to charmonium final states, including J/Psi, psi(2S), and chi_cJ. The latter two are first observations of these decays. We measure the branching fractions as follows: B(Y(1S)--> J/Psi+X)=(6.4+-0.4+-0.6)x10^-4, B(Y(1S)--> psi(2S)+X)/B(Y(1S)--> J/Psi+X)=0.41+-0.11+-0.08, B(Y(1S)--> chi_c1+X)/B(Y(1S)--> J/Psi+X)=0.35+-0.08+-0.06, B(Y(1S)--> chi_c2+X)/B(Y(1S)--> J/Psi+X)=0.52+-0.12+-0.09, and B(Y(1S)--> chi_c0+X)/B(Y(1S)--> J/Psi+X)<7.4% at 90% confidence level. We also report on the momentum and angular spectra of J/Psi's in Upsilon(1S) decay. The results are compared to predictions of the color octet and color singlet models.

13.25.Gv
electron positron: colliding beams
electron positron: annihilation
Upsilon(9460): electroproduction
Upsilon(9460): hadronic decay
charmonium
J/psi(3100): leptonic decay
J/psi(3100): polarization
J/psi(3100): angular distribution
psi(3685)

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