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- Title
On kaonic deuterium. Quantum field-theoretic and relativistic covariant approach.
- Authors
Ivanov, A.; Cargnelli, M.; Faber, M.; Fuhrmann, H.; Ivanova, V.; Marton, J.; Troitskaya, N.; Zmeskal, J.
- Abstract
We study kaonic deuterium, the boundK- dstate 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 ofK- dscattering for arbitrary relative momenta. Near threshold our formula reduces to the well-known DGBT formula. TheS-wave amplitude ofK- dscattering near threshold is defined by the resonances ?(1405), S(1750) and a smooth elastic background, and the inelastic channelsK- d?NYandK- d?NYp, whereY= S±,S{0} and ?{0}, where the final-state interactions play an important role. The Ericson-Weise formula for theS-wave scattering length ofK- dscattering 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 decaysAKd ?NYand experimental data on the rates of theNYpair production in the reactionsK- d?NY. We obtain G{1s} = (630±100)eV. For the shift of the energy level of the ground state of kaonic deuterium we predict e{1s} = (325±60)eV.
- Subjects
DEUTERIUM; KAONS; PARTICLES (Nuclear physics); QUANTUM field theory; ELASTIC wave scattering; INELASTIC scattering; SCATTERING (Physics); NUCLEAR energy
- Publication
European Physical Journal A -- Hadrons & Nuclei, 2005, Vol 23, Issue 1, p79
- ISSN
1434-6001
- Publication type
Article
- DOI
10.1140/epja/i2004-10055-3