Hadronic-loop induced mass shifts in scalar heavy-light mesons
arXiv:0712.2953 · doi:10.1016/j.physletb.2008.06.008
Abstract
We calculate the mass shifts of heavy-light scalar mesons due to hadronic loops under the assumption that these vanish for the groundstate heavy-light mesons. The results show that the masses calculated in quark models can be reduced significantly. We stress that the mass alone is not a signal for a molecular interpretation. Both the resulting mass and the width suggest the observed state could be a dressed state. We give further predictions for the bottom scalar mesons which can be used to test the dressing mechanism.
14 pages, 2 figures. Version accepted for publication in Phys. Lett. B