Stable, Doubly Heavy Tetraquark Mesons [Slides]
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Heavy-quark symmetry implies stable heavy tetraquark mesons $$Q_{i}Q_{j}\overline{q}_{k}\overline{q}_{l}$$. in the limit of very heavy quarks Q, novel narrow double heavy tetraquark state (DHTQ) must exist. HQS relates DHTQ mass to masses of a doubly heavy baryon, heavy-light baron, and heavy-light meson. The lightest double-beauty states composed of $$bb\overline{ud}$$, $$bb\overline{us}$$, and $$bb\overline{ds}$$ will likely be stable against strong decays. Heavier $$bb\overline{q}_{k}\overline{q}_{l}$$ states, $$cc\overline{q}_{k}\overline{q}_{l}$$ states, and mixed $$bc{q}_{k}\overline{q}_{l}$$ states, will likely dissociate into pairs of heavy-light mesons. Some might be seen as "double-flavor" resonances near threshold. Observing a weakly decaying double-beauty state would establish the existence of tetraquarks and illuminate the role of heavy color-$$\overline{3}$$ diquarks as hadron constituents.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1460417
- Report Number(s):
- FERMILAB-SLIDES--18-035-T; oai:inspirehep.net:1682387
- Country of Publication:
- United States
- Language:
- English
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