Observation of quasi two-body production in pion plus proton goes to neutron plus four charged pions at 8 geV/c

This thesis reports the first observation of quasi 2-body production in the backward reaction pi- P -> npi+pi+pi-pi-. Data were obtained using an 8 GeV/a pion beam incident on a liquid hydrogen target inside the University of Illinois/Argonne National Laboratory streamer chamber. The chamber was triggered by the interaction of a fast, forward neutral hadron in thick plate optical spark chambers. Total backward cross sections are derived for the processes pi-P -> N*o (1520)+p°/f°, N*o (1670)+po/fo I delta° (1890)+p°/f° I and delta-(1236)+A2+. Evidence for a narrow Ai resonance is not seen. Corrections for losses due to finite acceptance are made using Monte Carlo techniques based on a simple baryon exchange model. Comparison is made to another experiment regarding the energy dependence of certain cross sections and a simple power law behavior is observed.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year dc:date

2011

Author dc:creator

• Wroblicka, William Thaddeus

Contributors dc:contributor

• Eisenstein, Bob I.

• quasi two-body production
• pion plus proton
• neutron +4 charged pions
• liquid hydrogen

Statement dc:rights

• 1980 William Thaddeus Wroblicka

Language dc:language

en

Identifier

438024

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/25532