Observation of an exotic narrow doubly charmed tetraquark
Abstract
Conventional, hadronic matter consists of baryons and mesons made of three quarks and a quark-antiquark pair, respectively1,2. Here, we report the observation of a hadronic state containing four quarks in the Large Hadron Collider beauty experiment. This so-called tetraquark contains two charm quarks, a u ¯ and a d ¯ quark. This exotic state has a mass of approximately 3,875 MeV and manifests as a narrow peak in the mass spectrum of D0D0
- Publication:
-
Nature Physics
- Pub Date:
- June 2022
- DOI:
- 10.1038/s41567-022-01614-y
- arXiv:
- arXiv:2109.01038
- Bibcode:
- 2022NatPh..18..751L
- Keywords:
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- High Energy Physics - Experiment
- E-Print:
- 9 pages, 1 figure