Observation of and search for , , and at near 10.6 GeV at Belle
Using data samples of 89.5 fb-1, 711.0 fb-1, and 121.4 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider at center-of-mass energies 10.52 GeV, 10.58 GeV,and 10.867 GeV, respectively, we study the exclusive reactions e+e- → γχcj (J = 0, 1, 2) and e+e-→ γηc. A significant γχc1 signal is observed for the first time at cJ s = 10.58 GeV with a significance of 5.1σ including systematic uncertainties. No significant excesses for γχc0, γχc2, and γηc final states are found, and we set 90% credibility level upper limits on the Born cross sections (σB) at 10.52 GeV, 10.58 GeV, and 10.867 GeV. Together with cross sections measured by BESIII-+at lower center-of-mass energies, the energy dependency of σB(e+ e- → γχc1 ) is obtained.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States); Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); Univ. of Hawaii, Honolulu, HI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); Ministry of Education, Culture, Sports, Science and Technology
- Contributing Organization:
- Belle Collaboration
- Grant/Contract Number:
- SC0012704; SC0009973; SC0010504
- OSTI ID:
- 1484059
- Alternate ID(s):
- OSTI ID: 1488837; OSTI ID: 1593905
- Report Number(s):
- BNL-210815-2018-JAAM; PRVDAQ; 092015
- Journal Information:
- Physical Review D, Journal Name: Physical Review D Vol. 98 Journal Issue: 9; ISSN 2470-0010
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Observation of $e ^+ e ^− → γ χ_{ c 1}$ and search for $e ^+ e^ − → γ χ_ {c 0} , γ χ_{ c 2}$ , and $γ η_ c$ at $\sqrt{s}$ near 10.6 GeV at Belle
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