Exploring doubly heavy tetraquarks in a constituent-quark-model based meson-meson coupled-channels approach
Year: 2024
Type: article
Abstract: The LHCb Collaboration announced in 2021 the discovery of a new tetraquarklike state, named T c c + , with minimum quark content c c u ¯ d ¯ , close to the D 0 D * + threshold. This has motivated countless theoretical works trying to identify the dynamics which is responsible of the formation of such state; in particular, the one performed by us in Ortega [; ], where a D 0 D * + molecular candidate whose mass, width, scattering length, and effective ranges are in reasonable agreement with experimental measurements. We explore herein the possibility of having T c c + partners in all doubly heavy tetraquark sectors, considering doubly represented light antiquarks u , d , or s , and taking into account all possible spin-parity quantum numbers. The computation is done using a constituent-quark-model based meson-meson coupled-channels framework which has been tested many times in the last fifteen years describing conventional heavy mesons and baryons, their coupling with hadron-hadron thresholds but also in exploring its application to compact multiquark structures. The advantage of using an approach with such a relatively large history is that it allows us to make predictions because all the parameters have already been constrained from our previous works. Then, from this perspective, we present a parameter-free model-dependent prediction of doubly-heavy tetraquarks that may be partners of the discovered T c c + state. Published by the American Physical Society 2024
Authors: P. G. Ortega, D. R. Entem, F. Fernández, J. Segovia
Institutions: Universidad de Salamanca, Universidad Pablo de Olavide
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4402731825