Spin parity studies of the eta pi decay of the A2 meson and investigation of the A2 production mechanism in the reaction pi-minus proton goes to A2-minus proton
Lacy, Jeffrey Linn
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https://hdl.handle.net/2142/25868
Description
Title
Spin parity studies of the eta pi decay of the A2 meson and investigation of the A2 production mechanism in the reaction pi-minus proton goes to A2-minus proton
Author(s)
Lacy, Jeffrey Linn
Issue Date
1971
Doctoral Committee Chair(s)
Kruse, U.E.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
spin parity
Eta (η) pi decay
A2 meson
A2 production
meson production
Language
en
Abstract
The results of a spin parity analysis of the nv-decay mode of the A-meson produced in the reaction A2-p -A2-pare presented. Data
for the analysis are drawn from bubble chamber experiments between 3.9 and 16 GeV/c. The analysis favors JP=Z+ for both the upper and lower regions of the AZ' Possible evidence for a weakly produced JP=l daughter state is also presented. The evidence comes largely from an interference effect observed in the lower AZ region.
Using the A-nv-data along with data on the decay channel
A2- -> p0pi -at 5.0,7.5 and l1.Z GeV/c, the production mechanism of
A2 the A-in the reaction A2-p -A2-P is investigated. Assuming that this reaction is dominated by a t channel exchange mechanism the isospin and J parity of the exchange are investigated. The sand t cross section dependence of the data are compared with a simple Regge model.
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