TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
PY  - 2022
DA  - 2022//
TI  - Observation of an exotic narrow doubly charmed tetraquark
T2  - Nat. Phys.
JO  - Nature Physics
SP  - 751
EP  - 754
VL  - 18
PB  - Nature Portfolio
AB  - Conventional, hadronic matter consists of baryons and mesons made of three quarks and a quark-antiquark pair, respectively(1,2). 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) over bar and a (d) over tilde quark. This exotic state has a mass of approximately 3,875 MeV and manifests as a narrow peak in the mass spectrum of (DD0)-D-0 pi(+) mesons just below the D*D-+(0) mass threshold. The near-threshold mass together with the narrow width reveals the resonance nature of the state.
SN  - 1745-2473
UR  - https://arxiv.org/abs/2109.01038
UR  - https://doi.org/10.1038/s41567-022-01614-y
DO  - 10.1038/s41567-022-01614-y
LA  - English
N1  - WOS:000811954400004
ID  - LHCbCollaborationAaij_etal2022
ER  -