Direct Test of the Scalar-Vector Lorentz Structure of the Nucleon- and Antinucleon-Nucleus Potential
| dc.creator | Hofmann, R. | |
| dc.creator | Faessler, Amand | |
| dc.creator | Gutsche, Th. | |
| dc.date | 1999-07-08 | |
| dc.date.accessioned | 2026-07-07T10:54:52Z | |
| dc.date.available | 2026-07-07T10:54:52Z | |
| dc.description | Quantum Hadrodynamics in mean field approximation describes the effective nucleon-nucleus potential (about -50 MeV deep) as resulting from a strong repulsive vector (about 400 MeV) and a strong attractive scalar (about -450 MeV) contribution. This scalar-vector Lorentz structure implies a significant lowering of the threshold for $p\bar{p}$ photoproduction on a nucleus by about 850 MeV as compared to the free case since charge conjugation reverses the sign of the vector potential contribution in the equation of motion for the $\bar{p}$ states. It also implies a certain size of the photon induced $p\bar{p}$ pair creation cross section near threshold which is calculated for a target nucleus $^{208}$Pb. We also indicate a measurable second signature of the $p\bar{p}$ photoproduction process by estimating the increased cross section for emission of charged pions as a consequence of $\bar{p}$ annihilation within the nucleus. | |
| dc.description | 18 pages latex, 5 PS figures | |
| dc.identifier | https://arxiv.org/abs/nucl-th/9907030 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/9907030 | |
| dc.identifier | J.Phys.G25:1043-1055,1999 | |
| dc.identifier | doi:10.1088/0954-3899/25/5/308 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/185938 | |
| dc.subject | Nuclear Theory | |
| dc.title | Direct Test of the Scalar-Vector Lorentz Structure of the Nucleon- and Antinucleon-Nucleus Potential | |
| dc.type | text |