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At least 1,441 records · Page 80

Search for the process e + e $-$ → J / ψ X ( 1835 ) at s ≈ 10.6 GeV

We report the results of a search for the X(1835) state in the process e + e - →J/ψX(1835) using a data sample of 672 fb -1 collected with the Belle detector at and near the Υ(4S) resonance at the KEKB asymmetric-energy e + e - collider. No significant evidence is found for this process, and an upper limit is set on its cross section times the branching fraction: σ Born (e + e - →J/ψX(1835))•B(X(1835)→≥3 charged tracks)<1.3 fb at 90% confidence level.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗