Doubly heavy $QQ$ tetraquarks
Abstract
With the discovery of a doubly charmed $\Xi_{cc}$ baryon a somewhat forgotten issue of tetraquarks containing two heavy and two light (anti) quarks, ${\cal T}_{QQ}$, triggered theorist's interest. We discuss quark model estimates of ${\cal T}_{QQ}$ masses and such objects including a model where the light sector is treated as a soliton. We show that this model has different large $N_c$ limit than other approaches.
- Publication:
-
arXiv e-prints
- Pub Date:
- April 2019
- DOI:
- 10.48550/arXiv.1904.02676
- arXiv:
- arXiv:1904.02676
- Bibcode:
- 2019arXiv190402676P
- Keywords:
-
- High Energy Physics - Phenomenology
- E-Print:
- 6 pages, 2 figures, talk at the conference Excited QCD, Schladming, Austria, January 30 - February 3, 2019. In v2 minor typos corrected, references added