University of Illinois Urbana-Champaign

Observation of structure in the phi phi system produced in radiative J/psi decays

Tripsas, Basil

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https://hdl.handle.net/2142/23922

Description

Title
Observation of structure in the phi phi system produced in radiative J/psi decays
Author(s)
Tripsas, Basil
Issue Date
1988
Doctoral Committee Chair(s)
Gladding, G.E.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
  • observation of structure
  • phi phi system
  • radiative J/Psi decays
  • Mark III detector SPEAR
Language
en
Abstract
A sample of 4.9 million JI'I/J decays from the Mark III detector at SPEAR is used to study the radiative decay J I'I/J ---+ i¢¢. The decay is observed in two final states; iK+K-K+K-and the previously unobserved iK+K-K sKl. The new final state and an improved analysis of the all charged state allow the observation of a large enhancement in the ¢¢ mass spectrum in the region below 2.5 GeV Ie? in addition to the 1'Jc. The product branching ratio B(J/'I/J ---+ i1'Jc) x B(1'Jc ---+ ¢¢) is measured in both final states. The branching ratio to the low mass region, B(J/'I/J ---+ i¢¢ ,m(¢¢) < 2.51 GeV Ie?') is also measured. The angular distribution of the kaons is used to demonstrate that the enhancement is predominantly pseudoscalar. This effect is similar to what is observed in other radiative decays to two vector mesons and a photon. An upper limit is placed on the production of tensor glueball candidates observed to decay to ¢¢ by another experiment.
Type of Resource
text
Permalink
http://hdl.handle.net/2142/23922
Copyright and License Information
1988 Basil Tripsas

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