Tetraquark-adequate QCD sum rules

Autor(en)

Wolfgang Lucha, Dmitri Melikhov, Hagop Sazdjian

Abstrakt

With the experimental observation of several credible candidates for multiquark hadrons, the latter states re-entered the focus of interest of theoretical strong-interaction physics. Proper treatment of hadronic bound states by quantum chromodynamics, QCD, the quantum field theory governing all strong interactions, necessitates a nonperturbative approach. A well-established framework of this kind is provided by QCD sum rules relating hadron features to the parameters of QCD. Conceptual reconsideration, however, reveals that, in order to really match the peculiarities of multiquarks, the long-standing conventional QCD sum-rule techniques evidently must be subjected to considerable modification. The so far overlooked necessity for such adaptations is most easily demonstrated for the case of least complexity, that is, for tetraquarks, bound states of two quarks and two antiquarks.

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW), Lomonosov Moscow State University (MSU), Centre National De La Recherche Scientifique (CNRS)

Journal

Proceedings of Science (PoS)

Band

364

Anzahl der Seiten

6

DOI

https://doi.org/10.22323/1.364.0536

Publikationsdatum

11-2020

Peer-reviewed

Ja

ÖFOS 2012

103034 Teilchenphysik, 103012 Hochenergiephysik

ASJC Scopus Sachgebiete

General

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/b1fd0377-0ede-4344-80a8-271971271393