1. A study of the radiative CASCADE transitions between the Upsilon-Prime and Upsilon resonances
- Author
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Skwarnicki, Tomasz and Rybiki, K.
- Subjects
VALIDITY TEST [QUANTUM CHROMODYNAMICS] ,SPIN [CHI MESONS] ,MODEL: POTENTIAL ,+CHI+MESONS+PHOTON%22">UPSILON(10020) --> CHI MESONS PHOTON ,POTENTIAL [MODEL] ,BIBLIOGRAPHY ,MASS: CHI MESONS ,RADIATIVE DECAY: UPSILON(10020) ,THESIS ,ANGULAR CORRELATION ,UPSILON(10020) [CASCADE DECAY] ,FINAL STATE [(MUON+ MUON- 2PHOTON)] ,FINAL STATE: (MUON+ MUON- 2PHOTON) ,(MUON+ MUON- 2PHOTON) [FINAL STATE] ,DESY DORIS II STOR ,ELECTROPRODUCTION: UPSILON(10020) ,MULTIPOLE [PARTIAL WAVE ANALYSIS] ,BRANCHING RATIO ,ANNIHILATION: ELECTRON POSITRON ,FINAL STATE: (POSITRON ELECTRON 2PHOTON) ,(PHOTON) [ENERGY SPECTRUM] ,ELECTRON POSITRON [ANNIHILATION] ,BOTTOMONIUM ,(MUON+ MUON- 2PHOTON): FINAL STATE ,WIDTH [CHI MESONS] ,QUANTUM CHROMODYNAMICS: VALIDITY TEST ,ANNIHILATION [ELECTRON POSITRON] ,CHI MESONS: SPIN ,bottom [CHI MESONS] ,PARTIAL WAVE ANALYSIS: MULTIPOLE ,CHI MESONS: bottom ,CHI MESONS: MASS ,SPIN: CHI MESONS ,CASCADE DECAY: UPSILON(10020) ,CHI MESONS [SPIN] ,+UPSILON%289460%29+PHOTON%22">CHI MESONS --> UPSILON(9460) PHOTON ,10.02 GEV-CMS ,UPSILON(10020): CASCADE DECAY ,(POSITRON ELECTRON 2PHOTON) [FINAL STATE] ,FINAL STATE [(POSITRON ELECTRON 2PHOTON)] ,UPSILON(10020) [ELECTROPRODUCTION] ,EXPERIMENTAL RESULTS ,UPSILON(10020) [RADIATIVE DECAY] ,UPSILON(10020): RADIATIVE DECAY ,CHI MESONS [MASS] ,ENERGY SPECTRUM [(PHOTON)] ,RADIATIVE DECAY [UPSILON(10020)] ,CASCADE DECAY [UPSILON(10020)] ,(PHOTON): ENERGY SPECTRUM ,UPSILON(10020): ELECTROPRODUCTION ,ENERGY SPECTRUM: (PHOTON) ,MASS [CHI MESONS] ,QUANTUM CHROMODYNAMICS: SUM RULE ,ELECTROPRODUCTION [UPSILON(10020)] ,SUM RULE [QUANTUM CHROMODYNAMICS] ,CHI MESONS: WIDTH ,(POSITRON ELECTRON 2PHOTON): FINAL STATE ,Crystal Ball ,ELECTRON POSITRON: ANNIHILATION - Abstract
133 pp. (1986)., The cascade reaction $e^+e^- \to \Upsilon' \to \gamma X_b \to \gamma \gamma \Upsilon \to \gamma \gamma (\mu^+ \mu^-$ or $e^+e^-)$ has been studied with the Crystal Ball detector at the $e^+e^-$ storage ring DORIS-II. Two $x_b$ states are observed by monoenergetic photon lines at 107.7 ± 1.1 ± 1.0 MeV and 132.4 ± 0.9 ± 1.0 MeV, with amplitudes of 56 ± 6 and 82 ± 10 events correspondingly. Upper limits for full widths of those states at 90 % confidence level are < 6.2 MeV and < 6.9 MeV respectively...
- Published
- 1986
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