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Upper Limits on Inclusive Branching Fractions to Narrow States in Radiative J/ψ Decays


Dubois, Gregory P. (1992) Upper Limits on Inclusive Branching Fractions to Narrow States in Radiative J/ψ Decays. Dissertation (Ph.D.), California Institute of Technology.


The inclusive photon energy spectrum arising from J/ψ decays is studied in a sample of 4.83 x 10^6 produced J/ψ’s, with the very good energy resolution available through the observation of converted photons in the Mark III spectrometer. The spectrum is inspected for evidence of monochromatic lines due to two-body radiative J/ψ decays to narrow states. The decays J/ψ → γ + ή (958) and J/ψ → γ + ι/X (1450) are observed with limited statistical significance. No evidence is found for any other statistically significant structure in the inclusive spectrum. Upper limits are set on the branching fractions for the observed decays, as well as for the decays J/ψ → γ +ϕ/ϝο(1710) and J/ψ → γ + X(2230).

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Physics
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Thesis Availability:Restricted to Caltech community only
Research Advisor(s):
  • Hitlin, David G.
Thesis Committee:
  • Unknown, Unknown
Defense Date:4 February 1992
Record Number:CaltechTHESIS:08302011-160306362
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6635
Deposited By: John Wade
Deposited On:31 Aug 2011 15:40
Last Modified:26 Dec 2012 04:38

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