Masses of tetraquarks with open charm and bottom

TL;DR

This paper calculates the masses of heavy tetraquarks with open charm and bottom using a relativistic diquark-antidiquark model, providing insights into their possible structures and experimental interpretations.

Contribution

It introduces a relativistic framework for calculating tetraquark masses, accounting for diquark structure and dynamics, and offers new interpretations of experimental meson data.

Findings

Scalar D_{s0}^*(2317) and D_{s1}(2460) are unlikely tetraquarks.

D_s(2632) and D_{sJ}^*(2860) could be scalar and tensor tetraquarks.

Predicted masses for bottom counterparts of charmed tetraquarks.

Abstract

The masses of the heavy tetraquarks with open charm and bottom are calculated within the diquark-antidiquark picture in the framework of the relativistic quark model. The dynamics of the light quarks and diquarks is treated completely relativistically. The diquark structure is taken into account by calculating the diquark-gluon form factor. New experimental data on charmed and charmed-strange mesons are discussed. Our results indicate that the anomalous scalar D_{s0}^*(2317) and axial vector D_{s1}(2460) mesons could not be considered as diquark-antidiquark bound states. On the other hand, D_s(2632) and D_{sJ}^*(2860) could be interpreted as scalar and tensor tetraquarks, respectively. The predictions for masses of the corresponding bottom counterparts of the charmed tetraquarks are given.