6533b7d0fe1ef96bd125aea8

RESEARCH PRODUCT

Exploring the D* rho system within QCD sum rules

Fernando Silveira NavarraA. Martínez TorresEulogi OsetK. P. KhemchandaniMarina Nielsen

subject

PhysicsNuclear and High Energy PhysicsParticle physicsQCD sum rulesNuclear TheoryField (physics)Meson010308 nuclear & particles physicsNuclear TheoryFísicaParticle Data GroupCharmed mesonsQuantum number01 natural sciencesNuclear physicsHigh Energy Physics - PhenomenologyIsospin0103 physical sciencesEffective field theoryChiral dynamicsNuclear Experiment010306 general physicsSpin-½

description

We 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.

yearjournalcountryeditionlanguage
2013-10-28
10.1103/physrevd.88.074033http://hdl.handle.net/10261/126463