Implications of nucleon-nucleon spin-polarization measurements

Journal Article · Thu Jun 01 04:00:00 EDT 1978 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.17.2971· OSTI ID:7085355

Berger, E L; Irving, A C; Sorensen, C

We discuss available data for spin observables in pp and np elastic scattering above 3 Gev/c. We identify those measurements which isolate exchange amplitude components of specific interest: those which provide firm tests of Regge-exchange models and, on the other hand, those which models are unable to predict reliably. Using a simple Regge-pole-exchange model whose trajectory parameters and coupling properties are determined from data on other reactions, we compute expectations for all available pp spin observables and find good agreement with the data. We find that a hadronic axial-vector A/sub 1/-like exchange term is present in the data with strength compatible with theoretical estimates. The low-lying isoscalar excahnge observed in pp and np polarization is consistent with estimates based on epsilon (9/sup + +/) exchange. We make a careful study of possible nonasymptotic Regge contributions which could obscure the interpretation of amplitude structure at momenta up to 6 GeV/c. We provide predictions for spin-correlation observables in np elastic and in np charge-exchange scattering.

• Research Organization: High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 7085355
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 17:11; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645207* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions
Baryon No. Greater than 1-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
CHARGE-EXCHANGE INTERACTIONS
CROSS SECTIONS
ELASTIC SCATTERING
ENERGY RANGE
GEV RANGE
GEV RANGE 01-10
HADRON-HADRON INTERACTIONS
HELICITY
INTERACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
POLARIZATION
PROTON-NEUTRON INTERACTIONS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
REGGE POLES
S CHANNEL
SCATTERING
SPIN
STRONG INTERACTIONS
T CHANNEL