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Observation of Structures in the Processes e^{+}e^{-}→ωχ_{c1} and ωχ_{c2}.
- Source :
-
Physical review letters [Phys Rev Lett] 2024 Apr 19; Vol. 132 (16), pp. 161901. - Publication Year :
- 2024
-
Abstract
- We present measurements of the Born cross sections for the processes e^{+}e^{-}→ωχ_{c1} and ωχ_{c2} at center-of-mass energies sqrt[s] from 4.308 to 4.951 GeV. The measurements are performed with data samples corresponding to an integrated luminosity of 11.0 fb^{-1} collected with the BESIII detector operating at the Beijing Electron Positron Collider storage ring. Assuming the e^{+}e^{-}→ωχ_{c2} signals come from a single resonance, the mass and width are determined to be M=(4413.6±9.0±0.8) MeV/c^{2} and Γ=(110.5±15.0±2.9) MeV, respectively, which is consistent with the parameters of the well-established resonance ψ(4415). In addition, we also use one single resonance to describe the e^{+}e^{-}→ωχ_{c1} line shape and determine the mass and width to be M=(4544.2±18.7±1.7) MeV/c^{2} and Γ=(116.1±33.5±1.7) MeV, respectively. The structure of this line shape, observed for the first time, requires further understanding.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 132
- Issue :
- 16
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 38701481
- Full Text :
- https://doi.org/10.1103/PhysRevLett.132.161901