Neutral kaon pairs produced in ϕ decays in anti-symmetric entangled state can be exploited to search for violation of CPT symmetry and Lorentz invariance. We present an analysis of the CP-violating process ϕ→KSKL→π+π−π+π− based on 1.7 fb−1 of data collected by the KLOE experiment at the Frascati ϕ-factory DAΦNE. The data are used to perform a measurement of the CPT-violating parameters Δaμ for neutral kaons in the context of the Standard Model Extension framework. The parameters measured in the reference frame of the fixed stars are: Δa0=(−6.0±7.7stat±3.1syst)×10−18 GeV, ΔaX=(0.9±1.5stat±0.6syst)×10−18 GeV, ΔaY=(−2.0±1.5stat±0.5syst)×10−18 GeV, ΔaZ=(3.1±1.7stat±0.5syst)×10−18 GeV. These are presently the most precise measurements in the quark sector of the Standard Model Extension.

Babusci, D., Balwierz Pytko, I., Bencivenni, G., Bloise, C., Bossi, F., Branchini, P., et al. (2014). Test of CPT and Lorentz symmetry in entangled neutral kaons with the KLOE experiment. PHYSICS LETTERS. SECTION B, 730, 89-94 [10.1016/j.physletb.2014.01.026].

Test of CPT and Lorentz symmetry in entangled neutral kaons with the KLOE experiment

CERADINI, Filippo;DI CICCO, ALESSANDRO;LOFFREDO, SALVATORE;PRADO LONGHI, IVAN;TACCINI, CECILIA;
2014-01-01

Abstract

Neutral kaon pairs produced in ϕ decays in anti-symmetric entangled state can be exploited to search for violation of CPT symmetry and Lorentz invariance. We present an analysis of the CP-violating process ϕ→KSKL→π+π−π+π− based on 1.7 fb−1 of data collected by the KLOE experiment at the Frascati ϕ-factory DAΦNE. The data are used to perform a measurement of the CPT-violating parameters Δaμ for neutral kaons in the context of the Standard Model Extension framework. The parameters measured in the reference frame of the fixed stars are: Δa0=(−6.0±7.7stat±3.1syst)×10−18 GeV, ΔaX=(0.9±1.5stat±0.6syst)×10−18 GeV, ΔaY=(−2.0±1.5stat±0.5syst)×10−18 GeV, ΔaZ=(3.1±1.7stat±0.5syst)×10−18 GeV. These are presently the most precise measurements in the quark sector of the Standard Model Extension.
2014
Babusci, D., Balwierz Pytko, I., Bencivenni, G., Bloise, C., Bossi, F., Branchini, P., et al. (2014). Test of CPT and Lorentz symmetry in entangled neutral kaons with the KLOE experiment. PHYSICS LETTERS. SECTION B, 730, 89-94 [10.1016/j.physletb.2014.01.026].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/114464
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