University of Illinois Urbana-Champaign

Production of charmonium states in 225 GeV/c pi-minus beryllium interactions

Hahn, Stephen Robert

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https://hdl.handle.net/2142/25347

Description

Title
Production of charmonium states in 225 GeV/c pi-minus beryllium interactions
Author(s)
Hahn, Stephen Robert
Issue Date
1983
Doctoral Committee Chair(s)
Sard, R.D.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
  • charmonium states
  • pi-minus beryllium interactions
  • FNAL experiment
  • dimuon
Language
en
Abstract
This thesis reports on the analysis of data obtained during FNAL experiment EG10. The Chicago cyclotron Magnet Spectrometer was used to perform a study of the hadronic production of charmonium. A 225 GeV/c negative pion beam was incident on a beryllium target. The trigger required a dimuon signature which favored opposite sign muon pairs with a large combined PT. A search was then made for psi mesons of the charmonium spectrum by combining J,Af mesons found in the dimuon spectrum with photons detected in a large lead glass shower detector. These events were used to determine the fraction of Jl1Ys produced fran 'Xs. A i(3685) signal seen in the dimuon spectrum was used to determine the fraction of J/psi s resulting from i(3685). Assuming that these are the only particles decaying to J/psi, we obtain the fraction of J/psi produced directly in hadronic collisions-0.58±O.09 -which is relevant to the production mechanism for charmonium in strong interactions.
Type of Resource
text
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http://hdl.handle.net/2142/25347
Copyright and License Information
1983 Stephen Robert Hahn

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Dissertations and Theses - Physics
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Graduate Theses and Dissertations at Illinois