The processes e+e-→Σ0Σ¯0 and e+e-→Σ+Σ¯- are studied using initial-state-radiation events in a sample of 980 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The cross sections from the mass threshold to 3 GeV/c2 and the effective form factors of Σ0 and Σ+ are measured. In the charmonium region, we observe the decays J/ψ→Σ0Σ¯0 and J/ψ→Σ+Σ¯- and determine the respective branching fractions.
Study of e+e−→Σ0Σ¯0 and Σ+Σ¯− by initial state radiation method at Belle
Tenchini, F.;
2023-01-01
Abstract
The processes e+e-→Σ0Σ¯0 and e+e-→Σ+Σ¯- are studied using initial-state-radiation events in a sample of 980 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The cross sections from the mass threshold to 3 GeV/c2 and the effective form factors of Σ0 and Σ+ are measured. In the charmonium region, we observe the decays J/ψ→Σ0Σ¯0 and J/ψ→Σ+Σ¯- and determine the respective branching fractions.File in questo prodotto:
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