1998/08/18 by L. A. Kondratyuk, L.A. Kondratyuk, Ye. S. Golubeva +4
Computer Science · Decision Sciences · Physics and Astronomy · #Advanced Data Storage Technologies #FOS: Physical sciences #Nuclear Theory (nucl-th) #Nuclear physics research studies #Scientific Computing and Data Management #nucl-th
paper · pdf · doi:10.48550/arxiv.nucl-th/9808050
19 pages, 7 figures, gzipped tar file
arxiv created 1998/08/18 · openalex publication_date 1998/08/18 · arxiv updated 2009/12/01 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
We investigate the reactions p n -> d omega and p n -> d phi close to threshold and at higher energies. Near threshold we calculate the S-wave amplitudes within the framework of the two-step model which is described by a triangle graph with pi-mesons in the intermediate state and find a ratio of the S-wave amplitudes squared of R =|A(phi)|2/|A(omega)|2 = (4-8) x 10-3. Any significant enhancement of the experimental value of R(phi/omega) over this prediction can be interpreted as a possible contribution of the intrinsic s - anti s component in the nucleon-wave function. We present arguments that there is a strong resonance effect in the omega N channel close to threshold. At higher energies we calculate the differential cross sections of the reactions p n -> d omega, p n -> d phi and the ratio of the phi/omega yields within the framework of the quark-gluon string model. An irregular behavior of the phi/omega-ratio is found at s <= 12 GeV2 due to the interference of the t- and u-channel contributions.