On kaonic deuterium. Quantum field-theoretic and relativistic covariant approach |
| |
Authors: | Email author" target="_blank">A?N?IvanovEmail author M?Cargnelli M?Faber H?Fuhrmann V?A?Ivanova J?Marton N?I?Troitskaya J?Zmeskal |
| |
Institution: | (1) Atominstitut der Österreichischen Universitäten, Arbeitsbereich Kernphysik und Nukleare Astrophysik, Technische Universität Wien, Wiedner Hauptstr. 8-10, A-1040 Wien, Austria;(2) Institut für Mittelenergiephysik Österreichische Akademie der Wissenschaften, Boltzmanngasse 3, A-1090 Wien, Austria |
| |
Abstract: | We study kaonic deuterium, the bound K-d state AK d. Within a quantum field-theoretic and relativistic covariant approach we derive the energy level displacement of the ground state of kaonic deuterium in terms of the amplitude of K-d scattering for arbitrary relative momenta. Near threshold our formula reduces to the well-known DGBT formula. The S-wave amplitude of K-d scattering near threshold is defined by the resonances (1405), (1750) and a smooth elastic background, and the inelastic channels K-d NY and K-d NY , where Y = ±, {0} and {0}, where the final-state interactions play an important role. The Ericson-Weise formula for the S-wave scattering length of K-d scattering is derived. The total width of the energy level of the ground state of kaonic deuterium is estimated using the theoretical predictions of the partial widths of the two-body decays AKd NY and experimental data on the rates of the NY pair production in the reactions K-d NY. We obtain {1s} = (630±100)eV. For the shift of the energy level of the ground state of kaonic deuterium we predict {1s} = (325±60)eV. |
| |
Keywords: | 11 10 Ef Lagrangian and Hamiltonian approach 11 55 Ds Exact S matrices 13 75 Gx Pion-baryon interactions 36 10 -k Exotic atoms and molecules (containing mesons muons and other unusual particles) |
本文献已被 SpringerLink 等数据库收录! |
|