Search for the hyperon semileptonic decay ${\Xi }^{-}\to {\Xi }^0{e}^{-}\overline{{\nu }_e}$

Abstract

Using $(10.087\pm 0.044)\times 10^9$ $J/\psi$ events collected by the BESIII detector at the BEPCII collider, we search for the hyperon semileptonic decay ${\Xi }^{-}\to {\Xi }^0{e}^{-}{\bar{\nu }}_e$. No significant signal is observed and the upper limit on the branching fraction $\mathcal{B}({\Xi }^{-}\to {\Xi }^0{e}^{-}{\bar{\nu }}_e)$ is set to be $2.59\times 10^{-4}$ at 90 % confidence level. This result is one order of magnitude more strict than the previous best limit.

arXiv comment8 pages, 3 figures

References in corpus (16)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Future Physics Programme of BESIII
• Semileptonic Hyperon Decays
• Branching fraction measurements of χ_{c0} and χ_{c2} to π^0π^0 and ηη
• TopoAna: A generic tool for the event type analysis of inclusive Monte-Carlo samples in high energy physics experiments
• Prospects for rare and forbidden hyperon decays at BESIII
• Determination of the number of $J/\psi$ events with inclusive $J/\psi$ decays
• Non-standard semileptonic hyperon decays
• Hyperon Semileptonic decay constants with flavor SU(3) symmetry breaking
• Measurement of the branching ratios of the decays Xi0 --> Sigma+ e- nubar and anti-Xi0 --> anti-Sigma+ e+ nu
• Testing SU(3) Flavor Symmetry in Semileptonic and Two-body Nonleptonic Decays of Hyperons
• Test of SU(3) Symmetry in Hyperon Semileptonic Decays
• Search for Baryon and Lepton Number Violation in $J/\psi \to {\Lambda }_c^{+}{e}^{-}+c.c.$
• Measurement of the branching ratio of the decay ${\Xi }^0\to {\Sigma }^{+}{\mu }^{-}{\bar{\nu }}_{\mu }$

Cited by in corpus (8)

• First study of reaction ${\Xi }^{0}n\to {\Xi }^{-}p$ using ${\Xi }^0$-nucleus scattering at an electron-positron collider
• Production and decay of polarized hyperon-antihyperon pairs
• First measurement of $\Lambda N$ inelastic scattering with $\Lambda$ from $e^{+}{e}^{-}\to J/\psi \to \Lambda \bar{\Lambda }$
• Axial-vector transition form factors of the baryon octet to the baryon decuplet with flavor SU(3) symmetry breaking
• First measurement of ${\Sigma }^{+}n\to \Lambda p$ and ${\Sigma }^{+}n\to {\Sigma }^{0}p$ cross sections via ${\Sigma }^{+}$-nucleus scattering at an electron-positron collider
• New Physics Searches at Kaon and Hyperon Factories
• Search for hyperon $\Delta S=\Delta Q$ violating decay ${\Xi }^0\to {\Sigma }^{-}{e}^{+}{\nu }_e$
• Study of vector and axial-vector form factors and the decay parameters for the semileptonic hyperon decays