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

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 $D_0^{\ast }$ 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

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• A review of the open charm and open bottom systems
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• Subleading contributions to the width of the D_{s0}*(2317)
• Hadron loops effect on mass shifts of the charmed and charmed-strange spectra
• Understanding the charmed states recently observed by the LHCb and BaBar Collaborations in the quark model
• Threshold effects in P-wave bottom-strange mesons
• Masses of Scalar and Axial-Vector B Mesons Revisited
• Weak decays of heavy hadron molecules involving the f0(980)
• Near Mass Degeneracy in the Scalar Meson Sector: Implications for $B_{(s)0}^{\ast }$ and $B_{(s)1}^{\prime }$ Mesons
• Quasi-two-body decays $B_{(s)}\to P{D}_0^{\ast }(2400)\to PD\pi$ in the perturbative QCD approach
• Mass Spectra of Heavy-Light Mesons in Heavy Hadron Chiral Perturbation Theory
• The mass spectrum and strong decay properties of the charmed-strange mesons within Godfrey-Isgur model considering the coupled-channel effects
• Radiative decays of the $(0^{+},1^{+})$ strange-bottom mesons
• Hadronic loop effects to excited scalar charmed mesons revisited
• Exotic open and hidden charm states