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Study ofe+e−→ωχcJat Center of Mass Energies from 4.21 to 4.42 GeV
2015
Physical Review Letters
Based on data samples collected with the BESIII detector at the BEPCII collider at 9 center-of-mass energies from 4.21 to 4.42 GeV, we search for the production of e^+e^-→ωχ_cJ (J=0, 1, 2). The process e^+e^-→ωχ_c0 is observed for the first time, and the Born cross sections at √(s)=4.23 and 4.26 GeV are measured to be (55.4± 6.0± 5.9) and (23.7± 5.3± 3.5) pb, respectively, where the first uncertainties are statistical and the second are systematic. The ωχ_c0 signals at the other 7 energies and
doi:10.1103/physrevlett.114.092003
pmid:25793804
fatcat:vi7vgd2bhbcu5dzz4hogdy24q4