¯N interaction from meson-exchange and quark-gluon dynamics

Abstract

We investigate theDN interaction at low energies using a meson-exchange model supplemented with a short-distance contribution from one-gluon-exchange. The model is developed in close analogy to the meson-exchange KN interaction 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 involvingD * N ,D∆, andD * ∆ intermediate states. The short range part is assumed to receive additional contributions from genuine quark-gluon processes. The predicted cross sections forDN for excess energies up to 150 MeV are of the same order of magnitude as those for KN but with average values of around 20 mb, roughly a factor two larger than for the latter system. It is found that the ω-exchange plays a very important role. Its interference pattern with the ρ-exchange, which is basically fixed by the assumed SU(4) symmetry, clearly determines the qualitative features of theDN interaction -very similiar to what happens also for the KN system. PACS. 14.40.Lb Charmed mesons -12.39.Pn Potential models -12.40.-y Other models for strong interactions -13.75.Jz Kaon-baryon interactions

Combining heavy quark spin and local hidden gauge symmetries in the dynamical generation of hidden charm baryons

“…In [36,37] the work of [31] is retaken and appropriate modifications are done in the potentials and the regularization scheme. Similar work is also done by the Jülich group in [38][39][40]. All these works share the dynamical generation of the Λ c (2595), which comes mostly from the interaction of the DN channel.…”

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].…”

Charmed baryonic resonances in medium

“…Particularly, unitarized coupled-channel methods have been used in the meson-baryon sector with charm content [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21], mostly motivated by the parallelism between the Λ(1405) and the Λ c (2595).…”