Strange particle production in nucleon-nucleon collisions near threshold

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.56.2238· OSTI ID:542728

Rekalo, M P; Arvieux, J; Tomasi-Gustafsson, E ^[1]

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1. Direction des Sciences de la Matiere-Commissariat a l`Energie Atomique

Polarization observables for strange particle threshold production in the processes N+N{r_arrow}K+Y+N (where Y is a {Lambda} or a {Sigma}) are studied. The spin structure of the corresponding matrix elements is derived, assuming S-wave production. Using the P invariance of the strong interaction and the Pauli principle, it is shown that these reactions can be described in terms of two (in the case of pp collisions) or three (in the case of np-collisions) independent complex amplitudes. This results in a specific behavior for polarization observables which is described. Polarization observables are calculated in the S- and P-wave approximations. In the case of collinear kinematics, relationships between spin correlation coefficients and the spin structure of the nucleon are explained. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 542728
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 4 Vol. 56; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
KAONS
LAMBDA PARTICLES
MATRIX ELEMENTS
NUCLEON-NUCLEON INTERACTIONS
P INVARIANCE
P WAVES
PARTICLE PRODUCTION
POLARIZATION
S WAVES
SIGMA PARTICLES
SPIN
STRANGE PARTICLES