Study of J / psi decaying into omega p anti-p

Ablikim, M.; Bai, J.Z.; Ban, Y.; Cai, X.; Chen, H.F.; Chen, H.S.; Chen, H.X.; Chen, J.C.; Chen, Jin; Chen, Y.B.

doi:10.1140/epjc/s10052-007-0467-4

Study of J / psi decaying into omega p anti-p

BES

Collaboration

•

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

Oct, 2007

5 pages

Published in:

Eur.Phys.J.C 53 (2008) 15-20

e-Print:

0710.5369 [hep-ex]

DOI:

10.1140/epjc/s10052-007-0467-4

PDG:

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

\rightarrow

{{\mathit p}}{{\overline{\mathit p}}}{{\mathit \omega}}

Experiments:

BEPC-BES

View in:

ADS Abstract Service

pdf

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Abstract: (arXiv)

The decay

J/\psi \to \omega p \bar p

is studied using a

5.8 \times 10^7

J/\psi

event sample accumulated with the BES II detector at the Beijing electron-positron collider. The decay branching fraction is measured to be

B(J/\psi \to \omega p \bar p)=(9.8\pm 0.3\pm 1.4)\times 10^{-4}

. No significant enhancement near the

p\bar p

mass threshold is observed, and an upper limit of

B(J/\psi \to \omega X(1860))B(X(1860)\to p\bar p)

< 1.5 \times 10^{-5} is determined at the 95% confidence level, where X(1860) designates the near-threshold enhancement seen in the

p\bar p

mass spectrum in

J/\psi \to \gamma p \bar p

decays.

Note:

5 pages, 4 figures

electron positron: colliding beams
electron positron: annihilation
J/psi(3100): electroproduction
J/psi(3100): hadronic decay
p: pair production
omega(783): hadronic decay
postulated particle: X(1860)
Dalitz plot
mass spectrum
J/psi(3100): branching ratio

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