Narrow-width tetraquarks in large-N<sub>c</sub> QCD

Autor(en): Wolfgang Lucha, Dmitri Melikhov, Hagop Sazdjian
Abstrakt: The properties of possibly existing tetraquarks are studied in the large-N_c limit of QCD by means of four-point correlation functions of meson currents. The necessity of a detailed analysis of the singularities of Feynman diagrams, by means of the Landau equations, to recognize those diagrams that might contribute to the formation of tetraquark states, is emphasized. It is found, in general, that tetraquarks, if they exist, should have narrow widths of the order of N_c ⁻².
Organisation(en): Teilchenphysik
Externe Organisation(en): Österreichische Akademie der Wissenschaften (ÖAW), Lomonosov Moscow State University (MSU), Universität Wien, Centre National De La Recherche Scientifique (CNRS)
Journal: EPJ Web of Conferences
Band: 182
Anzahl der Seiten: 8
ISSN: 2101-6275
DOI: https://doi.org/10.1051/epjconf/201818202111
Publikationsdatum: 08-2018
Peer-reviewed: Ja
ÖFOS 2012: 103034 Teilchenphysik
ASJC Scopus Sachgebiete: Allgemeine Physik und Astronomie
Link zum Portal: https://ucrisportal.univie.ac.at/de/publications/9e1f3612-1bbe-45bc-b120-75907a3048f1