Di-Electron Bremsstrahlung in Intermediate-Energy pn and Dp Collisions
| dc.creator | Kaptari, L. P. | |
| dc.creator | Kampfer, B. | |
| dc.date | 2005-04-26 | |
| dc.date | 2005-10-14 | |
| dc.date.accessioned | 2026-07-07T11:32:45Z | |
| dc.date.available | 2026-07-07T11:32:45Z | |
| dc.description | Invariant mass spectra of di-electrons stemming from bremsstrahlung processes are calculated in a covariant diagrammatical approach for the exclusive reaction D p \to p_{\rm sp} n p e^+ e^- with detection of a forward spectator proton, p_{sp}. We employ an effective nucleon-meson theory for parameterizing the sub-reaction n p \to n p e^+ e^- and, within the Bethe-Salpeter formalism, derive a factorization of the cross section in the form {dσ_{D p \to p_{\rm sp} n p e^+ e^-}}/{dM}= {dσ_{n p \to n p e^+ e^-}}/{dM} \times kinematical factor related solely to the deuteron (M is the e^+ e^- invariant mass). The effective nucleon-meson interactions, including the exchange mesons π, σ, ωand ρas well as excitation and radiative decay of Δ(1232), have been adjusted to the process pp \to pp e^+ e^- at energies below the vector meson production threshold. At higher energies, contributions from ωand ρmeson excitations are analyzed in both, NN and Dp collisions. A relation to two-step models is discussed. Subthreshold di-electron production in Dp collisions at low spectator momenta is investigated as well. Calculations have been performed for kinematical conditions envisaged for forthcoming experiments at HADES. | |
| dc.identifier | https://arxiv.org/abs/nucl-th/0504072 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/0504072 | |
| dc.identifier | Nucl.Phys.A764:338-370,2006 | |
| dc.identifier | doi:10.1016/j.nuclphysa.2005.10.007 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/197707 | |
| dc.subject | Nuclear Theory | |
| dc.title | Di-Electron Bremsstrahlung in Intermediate-Energy pn and Dp Collisions | |
| dc.type | text |