Spin effects in pion-nucleon and nucleon-nucleon scattering at high energies and fixed angles

Conference · Mon May 01 04:00:00 EDT 1989 · AIP Conference Proceedings (American Institute of Physics) Conference Proceedings; (USA)

OSTI ID:5286206

Chavleishvili, M P ^[1]

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1. Joint Institute for Nuclear Research, Dubna (USSR)

Based on the study of the general structure of helicity amplitudes, obligatory kinematic factors are separated and the so-called dynamic amplitudes are introduced. These factors make conservation laws fulfill and contain all the kinematic singularities of helicity amplitudes. Via the dynamic amplitudes, the observable quantities are expressed in a simple form. Kinematic factors play the role of weighting functions. At high energies and fixed angles these factors turn into small parameters which suppress contributions of some helicity amplitudes, and enhance contributions of others. So we get the kinematic hierarchy for binary processes. As an example we consider {pi}N{minus} and NN-scattering. Predictions are given for some asymmetry parameters which do not coincide with the helicity conservation rules, predicted by QCD.

• OSTI ID: 5286206
• Report Number(s): CONF-880983--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics) Conference Proceedings; (USA) Journal Volume: 187:1
• Country of Publication: United States
• Language: English

Related Subjects

645300* -- High Energy Physics-- Particle Invariance Principles & Symmetries
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ASYMMETRY
BARYON-BARYON INTERACTIONS
CONSERVATION LAWS
ELASTIC SCATTERING
HADRON-HADRON INTERACTIONS
HELICITY
INTERACTIONS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PION-NUCLEON INTERACTIONS
S CHANNEL
SCATTERING
SCATTERING AMPLITUDES