Hadronic-loop induced mass shifts in scalar heavy-light mesons

Guo, Feng-Kun; Krewald, Siegfried; Meissner, Ulf-G.

Hadronic-loop induced mass shifts in scalar heavy-light mesons

Authors

Guo, Feng-Kun

Krewald, Siegfried

Meissner, Ulf-G.

Description

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 $D_0^*$ state could be a dressed $c\bar q$ 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