DN interaction from meson exchange

Abstract

A model of the DN interaction is presented which is developed in close analogy to the meson-exchangeKN potential of the Jülich group utilizing SU(4) symmetry constraints. The main ingredients of the interaction are provided by vector meson (ρ, ω) exchange and higher-order box diagrams involving D * N , D∆, and D * ∆ intermediate states. The coupling of DN to the πΛc and πΣc channels is taken into account. The interaction model generates the Λc(2595) resonance dynamically as a DN quasi-bound state. Results for DN total and differential cross sections are presented and compared with predictions of an interaction model that is based on the leading-order Weinberg-Tomozawa term. Some features of the Λc(2595) resonance are discussed and the role of the near-by πΣc threshold is emphasized. Selected predictions of the orginalKN model are reported too. Specifically, it is pointed out that the model generates two poles in the partial wave corresponding to the Λ(1405) resonance.PACS. 14.40.Lb Charmed mesons -13.75.Jz Kaon-baryon interactions -12.39.Pn Potential models

Strong couplings and form factors of charmed mesons in holographic QCD

“…For example, almost all knowledge on the DN interaction comes from calculations based on effective Lagrangians that are extensions of light-flavor chiral Lagrangians using SU (4) flavor symmetry [19][20][21][22][23][24][25] and heavy quark symmetry [6,26]. The Lagrangians involve coupling constants, like g ρDD , g ωDD , g ρD * D and g ρD * D * , whose values * aballonb@ift.unesp.br † gkrein@ift.unesp.br ‡ miller@ift.unesp.br are taken from SU (4) flavor and heavy-quark symmetry relations.…”

“…If in addition to SU (4) flavor symmetry, heavy-quark spin symmetry is invoked, one has g ρDD = g ρD * D = g ρD * D * = g πD * D to leading order in the charm quark mass [27,28]. The coupling g ρππ is constrained by experimental data; the studies of the DN interaction in Refs [22][23][24] utilized such a SU (4) relation, taking g ρππ = 6.0, which is the value used in a large body of work conducted within the Jülich model [29,30] for light-flavor hadrons. This value of g ρππ implies through SU (4) symmetry g ρDD = 3, which is not very much different from predictions based on the vector meson dominance (VMD) model: g DDρ = 2.52−2.8 [31,32].…”

Penta-Quark States with Strangeness, Hidden Charm and Beauty

“…Actually, Refs. [60,61] The possible states would be strongly coupled withDΣ c and BΣ b channels, respectively. In the first subsection, the predictions of such N * and Λ * resonances will be introduced.…”

Resonance Extraction from the Finite Volume

“…For comparison, the prediction based on the UχPT approach of Ref. [37] is also shown [35,36]. Dashed lines: Predictions based on the chiral unitary approach of Ref.…”