$Qq\bar Q\bar q'$ States in Chiral SU(3) Quark Model

TL;DR

This study calculates the masses of heavy-light tetraquark states using the chiral SU(3) quark model, providing insights into their possible identification with known exotic mesons and predicting new states, especially in the bottom sector.

Contribution

It applies the chiral SU(3) quark model to compute tetraquark masses, offering new perspectives on their experimental identification and potential existence.

Findings

Unlikely to interpret certain charmonium-like states as tetraquarks.

Predicted interesting tetraquark states in the bottom sector.

Provided mass estimates for various J^{PC} states.

Abstract

In this work, we study the masses of $Qq\bar Q\bar q'$ states with J^{PC}=0^{++}, 1^{++}, 1^{+-} and 2^{++} in the chiral SU(3) quark model, where Q is the heavy quark (c or b) and q (q') is the light quark (u, d or s). According to our numerical results, it is improbable to make the interpretation of $[cn\bar c\bar n]_{1^{++}}$ and $[cn\bar c\bar n]_{2^{++}}$ (n=u, d) states as X(3872) and Y(3940), respectively. However, it is interesting to find the tetraquarks in the $bq\bar b\bar q'$ system.