1304.5293 (S. Yasui et al.)

Spin degeneracy in multi-hadron systems with a heavy quark    [PDF]

S. Yasui, K. Sudoh, Y. Yamaguchi, S. Ohkoda, A. Hosaka, T. Hyodo

We study multi-hadron systems with a single heavy quark (charm or bottom) in the limit of heavy quark mass. We show that the spin degeneracy of the states with quantum numbers $(j+1/2)^{P}$ and $(j-1/2)^{P}$ for $j \neq 0$, known in a single hadron, can be generalized to multi-hadron systems. The spin degeneracy is the universal phenomena for any multi-hadron systems with a single heavy quark, irrespective of their internal structure, including compact multi-quarks, hadronic molecules and exotic nuclei. We demonstrate that the spin degeneracy is realized in the hadronic systems formed by a heavy hadron effective theory.

View original: http://arxiv.org/abs/1304.5293