Multiquark-Adequate QCD Sum Rules: the Case of Flavour-Exotic Tetraquarks
Institute for High Energy Physics, Austrian Academy of Sciences,
2 D. V. Skobeltsyn Institute of Nuclear Physics, M. V. Lomonosov Moscow State University, 119991 Moscow, Russia
3 Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
4 Institut de Physique Nucléaire, Université Paris-Sud, CNRS-IN2P3, Université Paris-Saclay, 91405 Orsay, France
Published online: 19 November 2019
Frequently, theoretical discussions of multiquark hadron states prove to be contaminated or even dominated by contributions of conventional hadrons. For the approach to QCD bound states in terms of QCD sum rules, we show how to get rid of all unwanted ordinary-hadron ballast by boiling down the traditional QCD sum-rule formalism to the nonconventional aspects in the focus of interest.
© The Authors, published by EDP Sciences, 2019
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