Stable Tetraquarks [Slides]
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Heavy-quark symmetry implies stable heavy tetraquark mesons $$Q_iQ_j\overline{q}_k\overline{q}_l$$ In the limit of very heavy quarks Q, novel narrow doubly heavy tetraquark states (DHTQ) must exist. HQS relates DHTQ mass to masses of a doubly heavy baryon, heavy-light baryon, and heavy-light meson. The lightest double-beauty states composed of $$bb \overline{u} \overline{d}$$, $$bb \overline{u}\overline{s}$$, and $$bb \overline{d} \overline{s}$$ 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 $$bc \overline{q}_k \overline{q}_l$$ states, will likely dissociate into pairs of heavy-light mesons. Some might be seen as \double- avor" 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:
- 1460416
- Report Number(s):
- FERMILAB-SLIDES--18-037-T; oai:inspirehep.net:1682388
- Country of Publication:
- United States
- Language:
- English
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