Titel
Tetraquark properties at large Nc
Autor*in
Hagop Sazdjian
Institut de Physique Nucléaire, Université Paris-Sud, CNRS-IN2P3, Université Paris-Saclay
Autor*in
Wolfgang Lucha
Institute for High Energy Physics, Austrian Academy of Sciences
Abstract
Considering quantum chromodynamics in the consistent limit of simultaneous correlated increase of the number of colours, Nc, beyond bounds and decrease of the strong coupling to zero allows for solid statements about qualitative features of the class of “truly exotic” tetraquark mesons carrying four mutually distinct quark flavours. Consistency criteria extracted from correlation functions for two-ordinary-meson scattering suggest the existence of more than one such tetraquarks, at least, of two tetraquarks of identical quark-flavour content and large-Nc behaviour of the total decay widths but differing in, and hence discriminable by, their predominant decay modes into two conventional mesons. This pairwise appearance is in conflict with the unique variant of such a four-quark bound state arising from the binding of diquark and antidiquark to a tetraquark by the strong interactions.
Objekt-Typ
Sprache
Englisch [eng]
Erschienen in
Titel
Proceedings of Science
Band
LC2019
ISSN
1824-8039
Erscheinungsdatum
2020
Publication
Sissa Medialab
Projekt
Kod / Identifikator
P29028
Projekt
Kod / Identifikator
824093
Erscheinungsdatum
2020
Zugänglichkeit
Rechteangabe
© Copyright owned by the author(s)

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