Testing nucleon strangeness in polarization effects for n+p -> d+eta


Koru H., Rekalo M.

INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS, vol.7, no.1, pp.139-145, 1998 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 7 Issue: 1
  • Publication Date: 1998
  • Doi Number: 10.1142/s0218301398000075
  • Title of Journal : INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS
  • Page Numbers: pp.139-145

Abstract

Charge symmetry of strong interaction results in a simplified spin structure of amplitude for n + p --> d + eta in "orthogonal" kinematics, where the eta-production angle is equal to 90 degrees in CMS. The presence of singlet and triplet amplitudes in such kinematics induces a rich set of different polarization observables, sensitive to the relative value of these amplitudes. This can be used to test a hypothesis of singlet enhancement of eta-production in NN- and (N) over bar N-collisions, due to a nonperturbative s (s) over bar-component of the nucleon with special polarization properties.