Ablikim, M.Achasov, M. N.Adlarson, P.Afedulidis, O.Ai, X. C.Aliberti, R.Çetin, Serkant Ali2024-05-192024-05-1920230031-90071079-7114https://doi.org10.1103/PhysRevLett.131.211902https://hdl.handle.net/20.500.12713/5872Using data samples with an integrated luminosity of 5.85 fb(-1) collected at center-of-mass energies from 4.61 to 4.95 GeV with the BESIII detector operating at the BEPCII storage ring, we measure the cross section for the process e(+)e(-) -> K+ K- J/psi. A new resonance with a mass of M = 4708(-15)(+17) +/- 21 MeV/c(2) and a width of Gamma = 126(-23)(+27) +/-+/- 30 MeV is observed in the energy-dependent line shape of the e(+)e(-) -> K+ K- J/psi. cross section with a significance over 5 sigma. The K(+)J/psi system is also investigated to search for charged charmoniumlike states, but no significant Z(cs)(+) states are observed. Upper limits on the Born cross sections for e+e- -> K-Z(cs)(3985)(+)/K-Z(cs)(4000)(+) + c:c: with Z(cs)(3985)(+/-)/Z(cs)(4000)(+/-) -> K(+/-)J/psi are reported at 90% confidence levels. The ratio of branching fractions {[B(Z(cs)(3985)(+) -> K+J/psi)]/B[Z(cs)(3985)(+) -> ((D) over bar D-0(s)*(+) + (D) over bar*D-0(s)+)]} is measured to be less than 0.03 at 90% confidence level.eninfo:eu-repo/semantics/openAccess[No Keywords]Observation of a Vector Charmoniumlike State at 4.7 GeV/c2 and Search for Zcs in e+e- ? K+ K- J/?Article1312138072611WOS:0011788940000012-s2.0-85179643463N/A10.1103/PhysRevLett.131.211902Q1