In this talk I present the results obtained using effective field theories in a finite volume from a reanalysis of recent lattice data on the KD ( * ) systems, where bound states of KD and KD * are found and associated with the states D * s0 (2317) and D * s1 (2460), respectively. We confirm the presence of such states on the lattice data and determine the weight of the KD channel in the wave function of D * s0 (2317) and that of KD * in the wave function of D * s1 (2460). Our results indicate a large component in both cases. XVII International Conference on Hadron Spectroscopy and Structure -Hadron2017
In this talk I show the results we have found by studying the D * ρ system with the method of QCD sum rules. We have investigated the different isospin and spin configurations and obtain three D * mesons with isospin I = 1/2, spin S = 0, 1, 2 and with masses 2500 ± 67 MeV, 2523 ± 60 MeV, and 2439 ± 119 MeV, respectively. Comparing our results with the states listed by the Particle Data Group, the last state can be related to D * 2 (2460) (spin 2), while one of the first two might be associated with D * (2640), whose spin-parity is unknown. In the case of I = 3/2 we also find evidences of three states with spin 0
In this talk we discuss about our recent work on nonstrange meson-baryon systems. Our objective is to study coupled channel meson-baryon interaction by considering the vector and pseudoscalar mesons and look for dynamically generated baryon resonances in such systems. For this we solve the Bethe-Salpeter equation with kernels obtained from chiral and hidden local symmetry Lagrangians. For the interactions between pseudoscalar mesons and baryons we rely on the Weinberg-Tomozawa theorem. When dealing with vector mesons, we calculate the s-, t-, uchannel diagrams and a contact term. Our study resulted in finding of resonances which can be related to N * (1535), N * (1650), N * (1895) and ∆(1620). We find that these resonances can be, at least partly, interpreted as dynamically generated resonances.
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