Properties of {eta}-meson production in nucleon-nucleon collisions near threshold
- Direction des Sciences de la Matiere-Commissariat a lEnergie Atomique
Polarization observables in {eta} production induced by NN collisions p+p{r_arrow}p+p+{eta}, n+p{r_arrow}n+p+{eta}, and n+p{r_arrow}d+{eta}, are derived. The unique S wave spin structure of the threshold amplitude for p+p{r_arrow}p+p+{eta} allows us to calculate all polarization observables in an universal form. Asymmetries in {rvec n}{rvec p} collisions, characterized by noninterfering singlet and triplet amplitudes, are calculated. From the large experimental ratio of the differential cross sections of the processes n+p{r_arrow}n+p+{eta} and p+p{r_arrow}p+p+{eta}, near threshold, one predicts large spin correlation coefficients C{sub xx} (C{sub yy}). The spin structure of S- and P- wave contributions is derived. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 496885
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 55; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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