Proton--proton interactions at 200 and 300 GeV/c

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1976

DOI:https://doi.org/10.2172/4075659· OSTI ID:4075659

Ogino, Fumio ^[1]

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1. Iowa State Univ., Ames, IA (United States)

The reactions pp → pp π⁺π^- and pp → ppπ⁺π^-π⁺π^- at 200 and 300 GeV/c were investigated using the Fermilab 30-inch hydrogen bubble chamber and downstream wide-gap spark chambers. This analysis is based upon approximately 9500 4- pronged and 6-pronged events. The cross sections were consistent with pomeron dominance for these reactions. The final state pp π⁺π^- is dominated by single diffractive dissociation, whose features are quite similar to those observed at low energy. A strong signal for double excitation was seen in the pp π⁺π^-π⁺π^- final state and pomeron factorization was found to be satisfied. In the pp π⁺π^- final state, 66 events passed the criterion of double pomeron exchange defined by D. M. Chew. However, these events were found to be severely contaminated by diffractive events. The two-particle exclusive azimuthal correlations agreed well with the prediction of a photostatistical model.

• Research Organization: Ames Lab., Ames, IA (United States)
• Sponsoring Organization: US Energy Research and Development Administration (ERDA)
• DOE Contract Number: W-7405-ENG-82
• NSA Number: NSA-33-021297
• OSTI ID: 4075659
• Report Number(s): IS-T--705
• Country of Publication: United States
• Language: English

Related Subjects

*PROTON-PROTON INTERACTIONS-- FINAL-STATE INTERACTIONS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BUBBLE CHAMBERS
CORRELATIONS
CROSS SECTIONS
DIFFRACTION MODELS
EXCITATION
EXCLUSIVE INTERACTIONS
FACTORIZATION
GEV RANGE 100-1000
LINEAR MOMENTUM
PARTICLE PRODUCTION
PIONS MINUS
PIONS PLUS
POMERANCHUK PARTICLES
PROTONS
WIDE GAP SPARK CHAMBERS