Observation of {psi}(3770){yields}{pi}{pi}J/{psi} and Measurement of {gamma}{sub ee}[{psi}(2S)]

Journal Article · Fri Mar 03 04:00:00 EST 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.082004· OSTI ID:20777063

Adam, N E; Alexander, J P; Berkelman, K; Cassel, D G; Crede, V; Duboscq, J E; Ecklund, K M; Ehrlich, R; Fields, L; Galik, R S; Gibbons, L; Gittelman, B; Gray, R; Gray, S W; Hartill, D L; Heltsley, B K; Hertz, D; Jones, C D; Kandaswamy, J; Kreinick, D L ^[1]

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1. Cornell University, Ithaca, New York 14853 (United States)

We observe signals for the decays {psi}(3770){yields}XJ/{psi} from data acquired with the CLEO detector operating at the CESR e{sup +}e{sup -} collider with {radical}(s)=3773 MeV. We measure the following branching fractions B({psi}(3770){yields}XJ/{psi}) and significances: (189{+-}20{+-}20)x10{sup -5} (11.6{sigma}) for X={pi}{sup +}{pi}{sup -} (80{+-}25{+-}16)x10{sup -5} (3.4{sigma}) for X={pi}{sup 0}{pi}{sup 0}, and (87{+-}33{+-}22)x10{sup -5} (3.5{sigma}) for X={eta}, where the errors are statistical and systematic, respectively. The radiative return process e{sup +}e{sup -}{yields}{gamma}{psi}(2S) populates the same event sample and is used to measure {gamma}{sub ee}[{psi}(2S)]=(2.54{+-}0.03{+-}0.11) keV.

• OSTI ID: 20777063
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 96; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BRANCHING RATIO
CESR STORAGE RING
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
ERRORS
GEV RANGE 01-10
HADRONIC PARTICLE DECAY
INCLUSIVE INTERACTIONS
J PSI-3097 MESONS
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PARTICLE PRODUCTION
PIONS MINUS
PIONS PLUS
POSITRONS
PSI-3770 MESONS
SIGNALS