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-Nc 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 Nc −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
Physics and Astronomy(all)
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/narrowwidth-tetraquarks-in-largenc-qcd(9e1f3612-1bbe-45bc-b120-75907a3048f1).html