https://doi.org/10.1051/epjconf/201611301015
Towards a Theoretical Understanding of the XYZ Mesons from QCD
Department of Physics, Ohio State University, Columbus OH 43210, USA
a e-mail: braaten@mps.ohio-state.edu
Published online: 25 March 2016
The XYZ mesons are mesons that contain a heavy quark and antiquark but have properties that seem to require additional constituents. Some of them are electrically charged, so they must be tetraquark mesons whose additional constituents are a light quark and antiquark. The list of XYZ mesons has grown to about two dozen over the last decade. A promising approach to understanding these mesons within QCD is the Born-Oppenheimer approximation, which reduces the problem to the solution of the Schrödinger equation in potentials that can be calculated using lattice QCD. The Born-Oppenheimer approximation has not yet revealed the pattern of the XYZ mesons, but it provides a compelling framework for understanding them from the fundamental theory.
© Owned by the authors, published by EDP Sciences, 2016
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