Published December 1, 2004 | Version v1
Journal article Metadata-only

First measurement of the branching fraction of J/ψ→γf2(1270)f2(1270)

Creators

  • 1. Institute of High Energy Physics, Beijing 100049 (China)

Description

Using 58 million J/ψ events taken with the BES II detector at the Beijing Electron Positron Collider, the decay J/ψ→γf2(1270)f2(1270)→γπ+π-π+π- is observed, and the branching fraction Br(J/ψ→γf2f2)=(9.5±0.7±1.6)x10-4 is measured for the first time, where the quoted errors are statistical and systematic, respectively. The branching fraction of J/ψ→γηc, ηc→f2f2 is also measured to be Br(J/ψ→γηc)·Br(ηc→f2f2)=(1.3±0.3-0.4+0.3)x10-4. The nonresonant branching fraction of J/ψ→γf2f2 is Br(J/ψ→γf2f2)=(8.2±0.8±1.7)x10-4

Additional details

Identifiers

DOI
10.1103/PhysRevD.70.112008;
arXiv
arXiv:hep-ex/0408026v1;

Publishing Information

Journal Title
Physical Review. D, Particles Fields
Journal Volume
70
Journal Issue
11
Journal Page Range
p. 112008-112008.7
ISSN
0556-2821
CODEN
PRVDAQ

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
37014099
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
BEIJING ELECTRON-POSITRON COLLIDER; BRANCHING RATIO; F2-1270 MESONS; J PSI-3097 MESONS; MULTIPARTICLE SPECTROMETERS; PARTICLE DECAY; PARTICLE IDENTIFICATION; PHOTONS; PIONS MINUS; PIONS PLUS
Descriptors DEC
ACCELERATORS; BOSONS; CHARMONIUM; DECAY; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; HADRONS; LINEAR ACCELERATORS; MASSLESS PARTICLES; MEASURING INSTRUMENTS; MESONS; PIONS; PSEUDOSCALAR MESONS; QUARKONIUM; SPECTROMETERS; STORAGE RINGS; TENSOR MESONS; VECTOR MESONS

Optional Information

Notes
(c) 2004 The American Physical Society
Collaborations
BES Collaboration