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Title:Comparison of Pion- and Proton-Production of Charmonium
Author(s):Graff, Thomas Leo
Department / Program:Physics
Discipline:Physics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):Physics, Elementary Particles and High Energy
Abstract:Charmonium (chi) states produced in (pi)-beryllium interactions at 190 Gev/c and in proton-beryllium interactions at 200 Gev/c and 250 Gev/c have been observed via their decay into J/(PSI)+(gamma). This experiment was carried out with the Chicago Cyclotron Magnet Spectrometer at Fermilab. The fraction of J/(PSI)'s resulting from (chi) decay is measured to be 0.33 (+OR-) 0.07 for incident pions and 0.47 (+OR-) 0.21 for incident protons. The (chi)(3510) and (chi)(3555) are produced in roughly equal numbers for pions, but the (chi)(3555) dominates for protons. Simple gluon fusion accounts for (chi) production by protons. This is reasonable considering the lack of valence antiquarks in the proton-beryllium system. Other mechanisms are needed to explain (chi) production by pions.
Issue Date:1984
Type:Text
Language:English
Description:155 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1984.
URI:http://hdl.handle.net/2142/77372
Other Identifier(s):(UMI)AAI8502156
Date Available in IDEALS:2015-05-13
Date Deposited:1984


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