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Remarks on the quantum numbers of X(3872) from the invariant mass distributions of the rho J/psi and omega J/psi final states
C. Hanhart, Yu. S. Kalashnikova, A. E. Kudryavtsev +1
We re-analyse the two- and three-pion mass distributions in the decays X(3872)->rho J/psi and X(3872)->omega J/psi and argue that the present data favour the 1++ assignment for the…
Three-body dynamics for the X(3872)
V. Baru, C. Hanhart, A. A. Filin +3
We investigate the role played by the three-body dynamics on the near-threshold resonance X(3872) charmonium state, which is assumed to be formed by nonperturbative $D\…
Bound state nature of the exotic Z_b states
Martin Cleven, Feng-Kun Guo, Christoph Hanhart +1
The assumption that the newly observed charged bottomonia states Z_b(10610) and Z_b(10650) are of molecular nature is confronted with the measured invariant mass distributions for…
Interplay of quark and meson degrees of freedom in a near-threshold resonance: multi-channel case
C. Hanhart, Yu. S. Kalashnikova, A. V. Nefediev
We investigate the interplay of quark and meson degrees of freedom in a physical state representing a near-threshold resonance for the case of multiple continuum channels. The aim…
Isospin splittings of doubly heavy baryons
Stanley J. Brodsky, Feng-Kun Guo, Christoph Hanhart +1
The SELEX Collaboration has reported a very large isospin splitting of doubly charmed baryons. We show that this effect would imply that the doubly charmed baryons are very compact…
N_c and m_pi dependence of rho and sigma mesons from unitarized Chiral Perturbation Theory
G. Rios, C. Hanhart, J. R. Pelaez
We review our work on the rho and sigma resonances derived from the Inverse Amplitude Method. In particular, we study the leading 1/N_c behavior of the resonances masses and widths…