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4 results on '"J/PSI(3100) --> PI0 PHOTON"'

1. Neutral Decays of the J/$\psi$ Particle

Author

H. Rieseberg, Joachim Heintze, P. Duinker, R. D. Heuer, P. Steffen, J. E. Olsson, A. P. Wagner, R. Mundhenke, W. Bartel, D. Pandoulas, G. Heinzelmann, and A.H. Walenta

Subjects
Nuclear and High Energy Physics, DECAY MODES [J/PSI(3100)], PHOTON [FINAL STATE], ((N)NEUTRAL PARTICLE) [FINAL STATE], WIDTH [J/PSI(3100)], J/PSI(3100) [DECAY MODES], +ETA%28958%29+PHOTON%22">J/PSI(3100) --> ETA(958) PHOTON, FINAL STATE [PHOTON], ETA(549), FINAL STATE [PI0], NONLEPTONIC DECAY [J/PSI(3100)], FOUR-PI-DETECTOR [EXPERIMENTAL RESULTS], Nuclear physics, +PI0+PHOTON%22">J/PSI(3100) --> PI0 PHOTON, J/PSI(3100) [NONLEPTONIC DECAY], ddc:530, +%28N%29NEUTRAL+PARTICLE%22">J/PSI(3100) --> (N)NEUTRAL PARTICLE, J/PSI(3100) [WIDTH], BRANCHING RATIO [J/PSI(3100)], Physics, DESY DORIS STOR, PI0 [FINAL STATE], EXPERIMENTAL RESULTS [FOUR-PI-DETECTOR], RADIATIVE DECAY [J/PSI(3100)], ETA(958), Charged particle, +2PHOTON%22">J/PSI(3100) --> 2PHOTON, +ETA%28549%29+PHOTON%22">J/PSI(3100) --> ETA(549) PHOTON
Abstract

The decay of J/ψ (3.1) into final states containing no charged particles has been studied experimentally. The partial decay width for the observed neutral decays is (470 ± 160) eV. The decay modes J/ψ → γη → 3γ and J/ψ γη′ → 3γ are identified and the branching ratios J ψ → γη J ψ → all = (1.3 ±0.4) × 10 −3 , and J ψ → γη′ J ψ → γη = 1.8 ±0.8 , are derived. Upper limits for the decay modes J/ψ → γπ0 and J/ψ → γγ are given.

Published
1977
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2. Neutral Decays of the J/$\psi$ Particle

Author

Bartel, W., Duinker, P., Olsson, J., Pandoulas, D., Steffen, P., Heintze, J., Heinzelmann, G., Heuer, R. D., Mundhenke, R., Rieseberg, H., Wagner, A., and Walenta, A. H.

Subjects
FINAL STATE: PI0, FINAL STATE: PHOTON, DESY DORIS STOR, +ETA%28958%29+PHOTON%22">J/PSI(3100) --> ETA(958) PHOTON, DECAY MODES: J/PSI(3100), +PI0+PHOTON%22">J/PSI(3100) --> PI0 PHOTON, WIDTH: J/PSI(3100), FOUR-PI-DETECTOR: EXPERIMENTAL RESULTS, ETA(958), ETA(549), J/PSI(3100): BRANCHING RATIO, +2PHOTON%22">J/PSI(3100) --> 2PHOTON, J/PSI(3100): NONLEPTONIC DECAY, J/PSI(3100): WIDTH, +ETA%28549%29+PHOTON%22">J/PSI(3100) --> ETA(549) PHOTON, +%28N%29NEUTRAL+PARTICLE%22">J/PSI(3100) --> (N)NEUTRAL PARTICLE, J/PSI(3100): DECAY MODES, PHOTON: FINAL STATE, NONLEPTONIC DECAY: J/PSI(3100), PI0: FINAL STATE, EXPERIMENTAL RESULTS: FOUR-PI-DETECTOR, FINAL STATE: ((N)NEUTRAL PARTICLE), J/PSI(3100): RADIATIVE DECAY
Abstract

Physics letters / B 66(5), 489 - 492 (1977). doi:10.1016/0370-2693(77)90594-9, The decay of J/ψ (3.1) into final states containing no charged particles has been studied experimentally. The partial decay width for the observed neutral decays is (470 ± 160) eV. The decay modes J/ ψ → γη → 3 γ and J/ ψ γη ′ → 3 γ are identified and the branching ratios J ψ → γη J ψ → all = (1.3 ±0.4) × 10 −3 , and J ψ → γη′ J ψ → γη = 1.8 ±0.8 , are derived. Upper limits for the decay modes J/ ψ → γπ 0 and J/ ψ → γγ are given., Published by North-Holland Publ., Amsterdam

Published
1977
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3. Radiative decays of the J/$\psi$ and evidence for a new heavy resonance

Author

Braunschweig, W., Martyn, H.-U., Hultschig, H., Joos, P., Koch, W., Kotz, U., Krehbiel, H., Kreinick, D., McNeely, W. A., Moffeit, K. C., Petersen, A., Schliwa, M., Sander, H. G., Wiik, B. H., Wolf, G., Grindhammer, Guenter, Ludwig, J., Mess, K. H., Poelz, G., Ringel, J., Sauerberg, K., Schmueser, Peter, de Boer, W., Schmitz, Daniel, Buschhorn, G., Gunderson, B., Kotthaus, R., Lierl, H., Oberlack, H., Pretzl, K., Orito, S., Suda, T., Totsuka, Y., Yamada, S., Sturm, W., DASP Collaboration, Wallraff, W., Berkelman, Karl, Cords, D., Felst, R., and Gadermann, E.

Subjects
RADIATIVE DECAY: WIDTH, J/PSI(3100): ELECTROPRODUCTION, ELECTROPRODUCTION [J/PSI(3100)], FINAL STATE [PHOTON], ETA(549), (3PHOTON) [FINAL STATE], J/PSI(3100): BRANCHING RATIO, FINAL STATE [PI0], EXPERIMENTAL RESULTS [DESY DORIS STOR], EXPERIMENTAL RESULTS: DESY DORIS STOR, +X%282830%29+PHOTON%22">J/PSI(3100) --> X(2830) PHOTON, WIDTH: RADIATIVE DECAY, BRANCHING RATIO [J/PSI(3100)], +3PHOTON%22">J/PSI(3100) --> 3PHOTON, +ETA%28958%29+PHOTON%22">J/PSI(3100) --> ETA(958) PHOTON, +PI0+PHOTON%22">J/PSI(3100) --> PI0 PHOTON, PI0 [FINAL STATE], COLLIDING BEAMS [ELECTRON POSITRON], FINAL STATE: (3PHOTON), RADIATIVE DECAY [J/PSI(3100)], ANNIHILATION: ELECTRON POSITRON, ELECTROPRODUCTION: J/PSI(3100), ETA(958), ELECTRON POSITRON: COLLIDING BEAMS, ELECTRON POSITRON [ANNIHILATION], +ETA%28549%29+PHOTON%22">J/PSI(3100) --> ETA(549) PHOTON, ANNIHILATION [ELECTRON POSITRON], PI0: FINAL STATE, J/PSI(3100) [ELECTROPRODUCTION], X(2830), J/PSI(3100): RADIATIVE DECAY, MAGNETIC SPECTROMETER: DASP, FINAL STATE: PI0, PHOTON [FINAL STATE], PHOTON: FINAL STATE, WIDTH [RADIATIVE DECAY], DESY DORIS STOR [EXPERIMENTAL RESULTS], ddc:530, DESY DORIS STOR: EXPERIMENTAL RESULTS, COLLIDING BEAMS: ELECTRON POSITRON, 3.1 GEV-CMS, FINAL STATE: PHOTON, DASP [MAGNETIC SPECTROMETER], ELECTRON POSITRON [COLLIDING BEAMS], RADIATIVE DECAY [WIDTH], High Energy Physics::Experiment, ELECTRON POSITRON: ANNIHILATION
Abstract

(1977). doi:10.1016/0370-2693(77)90114-9, The three photon final state produced in e + e − collisions has been measured at the mass of the J ψ resonance using the nonmagnetic part of the double arm spectrometer DASP. The decays J ψ → ηγ, η'γ and π o γ were observed and their branching ratios are given. A four standard deviation signal was observed in the γγ mass spectrum at a mass of (2.83 ± 0.03) GeV. An upper limit is given for the direct decay J ψ → 3γ .

Published
1977
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4. Untersuchung von Bhabhastreuung und kollinearen Photonpaaren für Schwerpunktsenergien von 3.1 und 3.7 GeV und von Strahlungszerfällen der $J/\psi$-Resonanz in pseudoskalare Mesonen am Speicherring DORIS

Author

Ludwig, Jens

Subjects
ELECTRON [FINAL STATE], +POSITRON+ELECTRON%22">PSI(3700) --> POSITRON ELECTRON, PHOTON: PAIR PRODUCTION, J/PSI(3100): ELECTROPRODUCTION, ELECTROPRODUCTION [J/PSI(3100)], FINAL STATE [PHOTON], ETA(549), ELECTROMAGNETIC DECAY [J/PSI(3100)], (3PHOTON) [FINAL STATE], FINAL STATE [PI0], THESIS, +2PHOTON%22">ELECTRON POSITRON --> 2PHOTON, FINAL STATE: POSITRON, +POSITRON+ELECTRON%22">J/PSI(3100) --> POSITRON ELECTRON, FINAL STATE [ELECTRON], +ETA%28958%29+PHOTON%22">J/PSI(3100) --> ETA(958) PHOTON, +PI0+PHOTON%22">J/PSI(3100) --> PI0 PHOTON, PI0 [FINAL STATE], COLLIDING BEAMS [ELECTRON POSITRON], FINAL STATE: (3PHOTON), RADIATIVE DECAY [J/PSI(3100)], POSITRON: FINAL STATE, ANNIHILATION: ELECTRON POSITRON, ELECTROPRODUCTION: J/PSI(3100), ETA(958), POSITRON [FINAL STATE], FINAL STATE: ELECTRON, ELECTRON POSITRON: COLLIDING BEAMS, ELECTRON POSITRON [ELASTIC SCATTERING], J/PSI(3100): ELECTROMAGNETIC DECAY, ELECTRON POSITRON [ANNIHILATION], ELECTROPRODUCTION [PSI(3700)], 3.1: 3.7 GEV-CMS, PHOTON [PAIR PRODUCTION], +ETA%28549%29+PHOTON%22">J/PSI(3100) --> ETA(549) PHOTON, ELASTIC SCATTERING: ELECTRON POSITRON, ELASTIC SCATTERING [ELECTRON POSITRON], ANNIHILATION [ELECTRON POSITRON], PI0: FINAL STATE, J/PSI(3100) [ELECTROPRODUCTION], PAIR PRODUCTION: PHOTON, MAGNETIC SPECTROMETER: DASP, J/PSI(3100): RADIATIVE DECAY, FINAL STATE: PI0, PHOTON [FINAL STATE], PSI(3700): ELECTROPRODUCTION, ELECTRON POSITRON: ELASTIC SCATTERING, PHOTON: FINAL STATE, PSI(3700): ELECTROMAGNETIC DECAY, MAGNETIC SPECTROMETER: EXPERIMENTAL RESULTS, COLLIDING BEAMS: ELECTRON POSITRON, ELECTROMAGNETIC DECAY [PSI(3700)], MAGNETIC SPECTROMETER [EXPERIMENTAL RESULTS], ELECTRON: FINAL STATE, FINAL STATE: PHOTON, DESY DORIS STOR, DASP [MAGNETIC SPECTROMETER], 3.7 GEV-CMS [3.1], ELECTROPRODUCTION: PSI(3700), ELECTRON POSITRON [COLLIDING BEAMS], PAIR PRODUCTION [PHOTON], PSI(3700) [ELECTROPRODUCTION], FINAL STATE [POSITRON], EXPERIMENTAL RESULTS: MAGNETIC SPECTROMETER, EXPERIMENTAL RESULTS [MAGNETIC SPECTROMETER], ELECTRON POSITRON: ANNIHILATION
Abstract

58 pp. (1976).

Published
1976
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