期刊
NUCLEAR PHYSICS A
卷 954, 期 -, 页码 365-370出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysa.2016.03.057
关键词
QCD; Exotic hadrons; Heavy quarks; Quark model
资金
- U.S. Department of Energy, Division of High Energy Physics [DE-FG02-13ER41958]
The meson X(3872) and several related states appear to be in large part hadronic molecules in which a heavy flavored meson (e.g., D-0) is bound to another heavy meson (e.g., (D) over bar*(0)). Although not the only contribution to the binding, pion exchange seems to play a crucial role in generating the longest-range force between constituents. Mesons without u and d light quarks (such as D-s) cannot exchange pions, but under suitable conditions can bind as a result of eta exchange. Channels in which this mechanism is possible are identified, and suggestions are made for searches for the corresponding molecular states, including a manifestly exotic baryonic Lambda(c)(D) over bar (s)* resonance decaying into J/psi Lambda. (C) 2016 Elsevier B.V. All rights reserved.
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