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

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Koru H., Rekalo M.

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

• Publication Type: Article / Article
• Volume: 7 Issue: 1
• Publication Date: 1998
• Doi Number: 10.1142/s0218301398000075
• Journal Name: INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS
• Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
• Page Numbers: pp.139-145
• Middle East Technical University Affiliated: No

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.