Quark spin structures of bottom-charmed threshold molecular states

Abstract

The implementation of the heavy quark spin symmetry in possible molecular states at the mixed bottom-charm threshold is somewhat different from that at the open charm or bottom thresholds. In particular it depends on two parameters describing separately the symmetry for the bottom and for charmed quarks. The corresponding spin structures of the $S$-wave molecular states of the meson pairs $B^{(\ast )}{D}^{(\ast )}$ are discussed as well as their consequences for properties of possible near-threshold resonances, analogs of the known charmonium-like and bottomonium-like $X$ and $Z$ states.

10 pages

References in corpus (9)

• Hadronic molecules
• Exotics: Heavy Pentaquarks and Tetraquarks
• Charmonium
• Discovery of doubly-charmed Xi_{cc} baryon implies a stable (b b ubar dbar) tetraquark
• Heavy-quark symmetry implies stable heavy tetraquark mesons $Q_i{Q}_j{\bar{q}}_k{\bar{q}}_l$
• The Heavy Quark Spin Symmetry Partners of the X(3872)
• The line shapes of the $Z_b(10610)$ and $Z_b(10650)$ in the elastic and inelastic channels revisited
• Pionic transitions from X(3872) to chi_{cJ}
• Two charmoniumlike charged axial resonances near 3885 MeV

Cited by in corpus (2)

• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• CME search at STAR