A model-independent analysis of p + p --> pp(1S0) + gamma
arXiv:1008.0943 · doi:10.1103/PhysRevC.82.065201
Abstract
The pp hard bremsstrahlung reaction, p + p --> pp(1S0) + gamma, in which the two protons in the final state are in the 1S0 state, is investigated theoretically. Here, the most general spin structure of the NN hard bremsstrahlung reaction, consistent with symmetry principles, is derived from a partial-wave expansion of this amplitude. Based on this spin structure, it is shown that there are only four independent spin matrix elements in this reaction, which is a direct consequence of reflection symmetry in the reaction plane. It is also shown that it requires at least eight independent observables to determine them uniquely. The present method provides the coefficients multiplying each spin operator in terms of the partial-wave or, equivalently, multipole amplitudes. Some observables are expressed explicitly in terms of these multipoles and a partial-wave analysis is performed. The results should be useful in the analyses of the experimental data on the p + p --> pp(1S0) + gamma reaction being taken, in particular, at the COSY accelerator facility, as well as in providing some theoretical guidance to the future experiments in this area.
arXiv comment10 pages, no figures, two footnotes and one reference added, to appear in PRC
References in corpus (6)
- Completeness Rules for Spin Observables in Pseudoscalar Meson Photoproduction
- Spin observables and the determination of the parity of in photoproduction reactions
- Observation of inverse diproton photodisintegration at intermediate energies
- Spin structure of spin-1/2 baryon and spinless meson production amplitudes in photo and hadronic reactions
- Energy dependence of hard bremsstrahlung production in proton-proton collisions in the Delta(1232) region
- Hard bremsstrahlung in the pp -> pp gamma reaction