D mesons in nuclear matter: A DN coupled-channel equations approach
- Departament d'Estructura i Constituents de la Materia Universitat de Barcelona, Diagonal 647, 08028 Barcelona (Spain)
A set of coupled two-body scattering equations is solved for the DN system embedded in an isosymmetric nuclear matter. The in-medium behavior of charmed D mesons (D{sup +},D{sup 0}), is investigated from the self-consistent solution within this scheme. The effective meson-baryon Lagrangian in charm quantum number one sector, the key ingredient in the present study, is adopted from a recent model by Hofmann and Lutz that has aimed at combining the charmed meson degree of freedom in a consistent manner with chiral unitary models. After a critical examination, the original model is modified in several important aspects, such as the method of regularization, to be more consistent and practical for our objective. The resultant interaction is used to reproduce the position and width of the s-wave {lambda}{sub c}(2593) resonance in the isospin zero DN channel. In the isospin one channel, it generates a rather wide resonance at {approx}2770 MeV. The corresponding in-medium solution is then sought by incorporating Pauli blocking and the D- and {pi}-meson dressing self-consistently. At normal nuclear matter density, the resultant {lambda}{sub c}(2593) is found to stay narrow and shifted at a lower energy, whereas the I=1 resonance is lowered in position as well and broadened considerably.
- OSTI ID:
- 20864235
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 74, Issue 6; Other Information: DOI: 10.1103/PhysRevC.74.065201; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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