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Title: Implications of nucleon-nucleon spin-polarization measurements

Abstract

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.

Authors:
; ;
Publication Date:
Research Org.:
High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois 60439
OSTI Identifier:
7085355
Resource Type:
Journal Article
Journal Name:
Phys. Rev., D; (United States)
Additional Journal Information:
Journal Volume: 17:11
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PROTON-NEUTRON INTERACTIONS; CHARGE-EXCHANGE INTERACTIONS; ELASTIC SCATTERING; PROTON-PROTON INTERACTIONS; CROSS SECTIONS; GEV RANGE 01-10; HELICITY; POLARIZATION; REGGE POLES; S CHANNEL; SPIN; T CHANNEL; ANGULAR MOMENTUM; BARYON-BARYON INTERACTIONS; BASIC INTERACTIONS; ENERGY RANGE; GEV RANGE; HADRON-HADRON INTERACTIONS; INTERACTIONS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; PROTON-NUCLEON INTERACTIONS; SCATTERING; STRONG INTERACTIONS; 645207* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions, Baryon No. Greater than 1- (-1987)

Citation Formats

Berger, E.L., Irving, A.C., and Sorensen, C.. Implications of nucleon-nucleon spin-polarization measurements. United States: N. p., 1978. Web. doi:10.1103/PhysRevD.17.2971.
Berger, E.L., Irving, A.C., & Sorensen, C.. Implications of nucleon-nucleon spin-polarization measurements. United States. doi:10.1103/PhysRevD.17.2971.
Berger, E.L., Irving, A.C., and Sorensen, C.. Thu . "Implications of nucleon-nucleon spin-polarization measurements". United States. doi:10.1103/PhysRevD.17.2971.
@article{osti_7085355,
title = {Implications of nucleon-nucleon spin-polarization measurements},
author = {Berger, E.L. and Irving, A.C. and Sorensen, C.},
abstractNote = {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.},
doi = {10.1103/PhysRevD.17.2971},
journal = {Phys. Rev., D; (United States)},
number = ,
volume = 17:11,
place = {United States},
year = {1978},
month = {6}
}