Charm tetraquarks in a non-relativistic quark model

37th Brazilian Meeting on Nuclear Physics

Debastiani, V.R.^1 ; Navarra, F.S.^1

Instituto de Física, Universidade de São Paulo, Rua do Matão Travessa R 187, São Paulo, SP

05508-090, Brazil^1

关键词: Bound state;    Charmonium;    Four-body systems;    Hadron spectroscopy;    Relativistic quark model;    Tetraquarks;    Two-body interactions;    Two-body systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/630/1/012047/pdf
DOI  :  10.1088/1742-6596/630/1/012047

来源: IOP

【 摘 要 】

New charmonium states have been discovered since 2003. Although some of them can be explained as cc states, others do not fit in the predictions of that spectrum. Exotic models have been proposed to explain these new states, regarded now as multiquark states in the charm sector. In this work we focus on two of the most discussed models: the tetraquark, which consists on a diquark-antidiquark system, and the meson molecule, which is a weakly bound state of two mesons. We have developed a non-relativistic approach to study exotic heavy hadron spectroscopy, where the four body system is considered as three subsequent two- body systems. We solve numerically the Schroedinger equation using an effective Cornell-like potential to model the two-body interaction in each step of the tetraquark calculation, and a Yukawa-like potential to describe the meson molecule.