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Exploring the D* rho system within QCD sum rules

AutorMartínez Torres, Alberto ; Khemchandani, Kanchan P.; Nielsen, M.; Navarra, F. S.; Oset, Eulogi
Palabras claveChiral dynamics
Charmed mesons
Fecha de publicación28-oct-2013
EditorAmerican Physical Society
CitaciónPhysical Review - Section D - Particles and Fields 88 (7): 074033 - 14 (2013)
ResumenWe present a study of the D* rho system made by using the method of QCD sum rules to determine the mass of possible resonances generated in the same system. Using isospin and spin projectors, we investigate the different configurations and obtain evidences for three D* mesons with isospin I = 1/2, spin S = 0, 1, 2 and with masses 2500 +/- 67, 2523 +/- 60, and 2439 +/- 119 MeV, respectively. The last state can be associated with D-2*(2460) ( spin 2) listed by the Particle Data Group, while one of the first two might be related to D* (2640), with unknown spin parity. In the case of I = 3/2 we also find evidences of three states with spin 0, 1, and 2, respectively, with masses 2467 +/- 82, 2420 +/- 128, and 2550 +/- 56 MeV. The results for the sector I = 1/2 and S 0, 1, 2, are intriguingly similar to a previous study of the D* rho system based on effective field theories, supporting in this way a molecular picture for the resonances D* (2640) and D-2* (2460), while the results for I = 3/2 hint towards the existence of exotic mesons since a multiquark configuration is required to get the quantum numbers of the states found.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevD.88.074033
URIhttp://hdl.handle.net/10261/126463
DOI10.1103/PhysRevD.88.074033
ISSN1550-7998
E-ISSN1550-2368
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