Heavy quark spin partners of the 
Y(4260)
 in coupled-channel formalism

Heavy-quark spin-symmetry (HQSS) partners of the isovector bottomonium like states Zb(10610) and Zb(10650) are predicted within the molecular picture. Treating both Zb’s as shallow bound states, we solve the system of coupled-channel integral equations for the contact plus one-pion exchange (OPE) potentials to predict the location of the partner states with the quantum numbers J++ (J = 0,1,2). In particular, we predict the existence of a narrow tensor 2++ state residing a few MeV below the B∗ B¯∗ threshold. It is emphasised that the tensor part of the OPE potential in combination with HQSS breaking due to the nonvanishing B∗ -B mass splitting has a significant impact on the location of this partner state.

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Charmed dibaryon resonances in the potential quark model

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194519600048 ◽

2019 ◽

Vol 49 ◽

pp. 1960004 ◽

Cited By ~ 3

Author(s):

Makoto Oka ◽

Saori Maeda ◽

Yan-Rui Liu

Keyword(s):

Heavy Quark ◽

Spin Symmetry ◽

Binding Energies ◽

Resonance States ◽

Complex Scaling Method ◽

Quark Spin ◽

Heavy Quark Spin Symmetry ◽

Heavy Quark Limit ◽

Partial Channel ◽

Coupled Channel

Charmed dibaryon states with the spin-parity [Formula: see text], and [Formula: see text] are predicted for the two-body [Formula: see text] ([Formula: see text], [Formula: see text], or [Formula: see text]) systems. We employ the complex scaling method for the coupled channel Hamiltonian with the [Formula: see text]-CTNN potentials, which were proposed in our previous study. We find four sharp resonance states near the [Formula: see text] and [Formula: see text] thresholds. From the analysis of the binding energies of partial channel systems, we conclude that these resonance states are Feshbach resonances. We compare the results with the [Formula: see text] resonance states in the heavy quark limit, where the [Formula: see text] and [Formula: see text] thresholds are degenerate, and find that they form two pairs of the heavy-quark doublets in agreement with the heavy quark spin symmetry.

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PREDICTION OF HIDDEN CHARM BARYONS WITH HEAVY QUARK SPIN AND LOCAL HIDDEN GAUGE SYMMETRIES

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194514600726 ◽

2014 ◽

Vol 26 ◽

pp. 1460072

Author(s):

CHU-WEN XIAO ◽

JUAN NIEVES ◽

EULOGIO OSET

Keyword(s):

Heavy Quark ◽

Spin Symmetry ◽

Baryon Interaction ◽

Gauge Symmetries ◽

Quark Spin ◽

Heavy Quark Spin Symmetry ◽

Unitary Approach ◽

Basic States ◽

Charm Baryons ◽

Coupled Channel

In our talk, we explore a coupled channel unitary approach to investigate the meson baryon interaction with hidden charm, using constraints of heavy quark spin symmetry. With the full space of states demanded by the heavy quark spin symmetry and the dynamics of the local hidden gauge, we find four basic states which are bound by about 50 MeV with respect to the corresponding [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] thresholds respectively and decay mostly into ηcN and J/ψN. All the states appear in isospin I = 1/2, some of which are degenerated in different momentum J.

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