Study of polarized proton diffraction dissociation in the reaction p/sub arrow-up/p. -->. p. pi. /sup +/. pi. /sup -/p at 11. 75 GeV/c

Journal Article · Thu May 01 04:00:00 EDT 1986 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.33.2528· OSTI ID:5873780

Finley, J P; Wicklund, A B; Arenton, M W; Ayres, D S; Diebold, R; Kramer, S L; May, E N; Nodulman, L J; Sauer, J R

We present angular distributions and, for the first time, single-spin correlations in the diffraction-dissociation reaction p/sub arrow-up/p..-->..p..pi../sup +/..pi../sup -/p, for small momentum transfers between the polarized beam and the (p..pi../sup +/..pi../sup -/) system, at 11.75 GeV/c. The only structures seen in our 2 x 10/sup 6/-event sample turn out to be the well-known threshold enhancement in ..delta pi.. and the N(1700), which appears to involve both ..delta pi.. and N(1520)..pi... The production process exhibits a slope-mass correlation and patterns of helicity nonconservation seen in higher-energy diffractive processes. We also see evidence for a complex helicity structure in the spin correlations. We show that the threshold enhancement is unambiguously S wave in character, while the N(1700) appears to be a mix of states. The overall similarities between our data and those at higher energies, together with the rich structures contained in the angular-distribution correlations (we measure 315 joint moments in each mass and t bin), make our data base highly relevant for theoretical analysis of exclusive diffraction.

• Research Organization: Argonne National Laboratory, 9700 So. Cass Ave., Argonne, Illinois 60439
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5873780
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 33:9; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BARYON RESONANCES
BARYON-BARYON INTERACTIONS
BARYONS
BEAMS
BOSONS
DATA
DIFFRACTION MODELS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
GEV RANGE 10-100
HADRON-HADRON INTERACTIONS
HADRONS
HELICITY
INFORMATION
INTERACTIONS
MATHEMATICAL MODELS
MESONS
MOMENTUM TRANSFER
N RESONANCES
N-1520 RESONANCES
N-1700 RESONANCES
NUCLEON-NUCLEON INTERACTIONS
NUMERICAL DATA
PAIR PRODUCTION
PARTIAL WAVES
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PIONS
POLARIZED BEAMS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
S WAVES
SPIN