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.
2023
Ablikim, M.; Achasov, M.  N.; Adlarson, P.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, M.  R.; An, Q.; Bai, X.  H.; Bai, Y.; Bakina, O.; Baldini Fer...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2530152
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