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Title:Production of Charmonium States in 225 Gev/c Negative Pion Beryllium Interactions
Author(s):Hahn, Stephen Robert
Department / Program:Physics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Physics, Elementary Particles and High Energy
Abstract:This thesis reports on the analysis of data obtained during FNAL experiment E610. 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 p(,(tau)). A search was then made for (chi) mesons of the charmonium spectrum by combining J/(psi) 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 J/(psi)s produced from (chi)s. A (psi)(3685) signal seen in the dimuon spectrum was used to determine the fraction of J/(psi)s resulting from (psi)(3685). Assuming that these are the only particles decaying to J/(psi), we obtain the fraction of J/(psi)s produced directly in hadronic collisions--0.58 (+OR-) 0.09--which is relevant to the production mechanism for charmonium in strong interactions.
Issue Date:1983
Description:240 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1983.
Other Identifier(s):(UMI)AAI8409941
Date Available in IDEALS:2015-05-13
Date Deposited:1983

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