Measurement of the charge asymmetry for the $K_S\to \pi e\nu$ decay and test of CPT symmetry with the KLOE detector

Abstract

Using 1.63 fb${}^{-1}$ of integrated luminosity collected by the KLOE experiment about $7\times 10^4$ $K_S\to {\pi }^{\pm }{e}^{\mp }\nu$ decays have been reconstructed. The measured value of the charge asymmetry for this decay is $A_S=(-4.9\pm 5.7_{stat}\pm 2.6_{syst})\times 10^{-3}$, which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives $A_S=(-3.8\pm 5.0_{stat}\pm 2.6_{syst})\times 10^{-3}$ and, together with the asymmetry of the $K_L$ semileptonic decay, provides significant tests of the CPT symmetry. The obtained results are in agreement with CPT invariance.

arXiv commentsubmitted to JHEP

References in corpus (8)

• Tests of Lorentz invariance: a 2013 update
• An evaluation of |Vus| and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays
• Data handling, reconstruction, and simulation for the KLOE experiment
• A Measurement of the KL Charge Asymmetry
• Determination of CP and CPT violation parameters in the neutral kaon system using the Bell-Steinberger relation and data from the KLOE experiment
• Decoherence and CPT Violation in a Stringy Model of Space-Time Foam
• Searching for T,CP,CPT,and ΔS = ΔQ rule violations in the neutral K meson system - a guide
• Vus and lepton universality from kaon decays with the KLOE detector

Cited by in corpus (4)

• Observability of spontaneous collapse in flavor oscillations and its relation to the CP and CPT symmetries
• Effect of $K^0-{\bar{K}}^0$ Mixing on CP and CPT Violations in $B_c^{\pm }\to B^{\pm }{K}_{S,L}^0$ Decays
• Search for hyperon $\Delta S=\Delta Q$ violating decay ${\Xi }^0\to {\Sigma }^{-}{e}^{+}{\nu }_e$
• Status and Prospects of Discrete Symmetries Tests in Positronium Decays with the J-PET Detector