Using a data sample of (1.0087 \pm 0.0044)x10^(10) Jpsi decay events collected with the BESIII detector at the center-of-mass energy of sqrt(3.097) GeV, we present a search for the hyperon semileptonic decay Ξ0 → Σ−e+νe which violates the ΔS 1⁄4 ΔQ rule. No significant signal is observed, and the upper limit on the branching fraction B(Ξ0 → Σ−e+νe) is determined to be 1.6 × 10−4 at the 90% confidence level. This result improves the previous upper limit result by about one order of magnitude.
Search for hyperon ΔS=ΔQ violating decay Ξ0→Σ−e+νe
Garzia, I.;Scodeggio, M.;
2023
Abstract
Using a data sample of (1.0087 \pm 0.0044)x10^(10) Jpsi decay events collected with the BESIII detector at the center-of-mass energy of sqrt(3.097) GeV, we present a search for the hyperon semileptonic decay Ξ0 → Σ−e+νe which violates the ΔS 1⁄4 ΔQ rule. No significant signal is observed, and the upper limit on the branching fraction B(Ξ0 → Σ−e+νe) is determined to be 1.6 × 10−4 at the 90% confidence level. This result improves the previous upper limit result by about one order of magnitude.File in questo prodotto:
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