Neutral kaon pairs produced in Ï 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 Ï â KSKL â Ï +Ï -Ï +Ï - based on 1.7 fb -1 of data collected by the KLOE experiment at the Frascati Ï-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)Ã10-18 GeV,δaX=(0.9±1.5stat±0.6syst)Ã10-18 GeV,δaY=(-2.0±1.5stat±0.5syst)Ã10-18 GeV,δaZ=(3.1±1.7stat±0.5syst)Ã10-18 GeV. These are presently the most precise measurements in the quark sector of the Standard Model Extension. © 2014 The Authors.
Test of CPT and Lorentz symmetry in entangled neutral kaons with the KLOE experiment
ERRIQUEZ, Onofrio;
2014-01-01
Abstract
Neutral kaon pairs produced in Ï 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 Ï â KSKL â Ï +Ï -Ï +Ï - based on 1.7 fb -1 of data collected by the KLOE experiment at the Frascati Ï-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)Ã10-18 GeV,δaX=(0.9±1.5stat±0.6syst)Ã10-18 GeV,δaY=(-2.0±1.5stat±0.5syst)Ã10-18 GeV,δaZ=(3.1±1.7stat±0.5syst)Ã10-18 GeV. These are presently the most precise measurements in the quark sector of the Standard Model Extension. © 2014 The Authors.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
