Spin degeneracy in multi-hadron systems with a heavy quark

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• 作者：Shigehiro Yasui ; Kazutaka Sudoh ; Yasuhiro Yamaguchi ; Shunsuke Ohkoda ; Atsushi Hosaka ; Tetsuo Hyodo
• 关键词：Heavy quark effective theory ; Heavy meson effective theory ; Exotic hadrons ; Exotic nuclei
• 刊名：Physics Letters B
• 出版年：25 November, 2013
• 年：2013
• 卷：727
• 期：1-3
• 页码：185-189
• 全文大小：214 K

文摘

We study multi-hadron systems with a single heavy quark (charm or bottom) in the limit of heavy quark mass. The spin degeneracy of the states with quantum numbers and for , known in a normal 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 structures, including compact multi-quarks, hadronic molecules and exotic nuclei. We demonstrate the spin degeneracy in the hadronic systems formed by a heavy hadron effective theory: states with a , meson and a nucleon N, and a meson in nuclear matter. The spin degeneracy in the multi-hadron systems with a single heavy quark provides us with useful information about mass spectra, decays and productions in a model-independent manner.