Refine
Year of publication
- 2023 (88) (remove)
Language
- English (88)
Has Fulltext
- yes (88)
Is part of the Bibliography
- no (88)
Keywords
- e +-e − Experiments (5)
- Charm Physics (2)
- Electroweak Interaction (2)
- Particle and Resonance Production (2)
- Quark-Gluon Plasma (2)
- Quarkonium (2)
- BESIII (1)
- Born cross section measurement (1)
- Branching fraction (1)
- Branching fractions (1)
- Charm quark spatial diffusion coefficient (1)
- Charmonium (-like) (1)
- Collectivity (1)
- Correlation (1)
- Dark photon (1)
- Dark sector (1)
- Elliptic flow (1)
- Exotics (1)
- FOS: Physical sciences (1)
- Flavour Physics (1)
- Hadron-Hadron Scattering (1)
- Hadron-Hadron Scattering Heavy (1)
- Heavy Ion Experiment (1)
- Heavy Ion Experiments (1)
- Heavy Quark Production (1)
- Heavy-Ion Collision (1)
- Heavy-flavor decay electron (1)
- High Energy Physics - Experiment (hep-ex) (1)
- Invisible decays (1)
- Jets (1)
- Jets and Jet Substructure (1)
- Polarization (1)
- Properties of Hadrons (1)
- QCD (1)
- Quark Production (1)
- Semi-leptonic decays (1)
- Shear viscosity (1)
- Spectroscopy (1)
- Vector Boson Production (1)
- helicity amplitude analysis (1)
- Λ+c baryon (1)
Institute
- Physik (69)
- Frankfurt Institute for Advanced Studies (FIAS) (49)
- Informatik (30)
- Medizin (1)
Using a sample of (10087±44)×106 J/ψ events, which is about fifty times larger than that was previously analyzed, a further investigation on the J/ψ→γ3(π+π−) decay is performed. A significant distortion at 1.84 GeV/c2 in the line-shape of the 3(π+π−) invariant mass spectrum is observed for the first time, which is analogous to the behavior of X(1835) and could be resolved by two overlapping resonant structures, X(1840) and X(1880). The new state X(1880) is observed with a statistical significance of 14.7σ. The mass and width of X(1880) are determined to be 1882.1±1.7±0.7 MeV/c2 and 30.7±5.5±2.4 MeV, respectively, which indicates the existence of a pp¯ bound state.