Using 1.63 fb−1 of integrated luminosity collected by the KLOE experiment about 7 × 10^4 KS → π± e∓ ν decays have been reconstructed. The measured value of the charge asymmetry for this decay is AS = (−4.9 ± 5.7stat ± 2.6syst) × 10^−3, which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives AS = (−3.8 ± 5.0stat ± 2.6syst) × 10−3 and, together with theasymmetry of the KL semileptonic decay, provides significant tests of the CPT symmetry. The obtained results are in agreement with CPT invariance.
Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., et al. (2018). Measurement of the charge asymmetry for the KS → πeν decay and test of CPT symmetry with the KLOE detector. JOURNAL OF HIGH ENERGY PHYSICS(9) [10.1007/JHEP09(2018)021].
Measurement of the charge asymmetry for the KS → πeν decay and test of CPT symmetry with the KLOE detector
Fantini A.;Loffredo S.;Messi R.;Tortora L.;
2018-09-05
Abstract
Using 1.63 fb−1 of integrated luminosity collected by the KLOE experiment about 7 × 10^4 KS → π± e∓ ν decays have been reconstructed. The measured value of the charge asymmetry for this decay is AS = (−4.9 ± 5.7stat ± 2.6syst) × 10^−3, which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives AS = (−3.8 ± 5.0stat ± 2.6syst) × 10−3 and, together with theasymmetry of the KL semileptonic decay, provides significant tests of the CPT symmetry. The obtained results are in agreement with CPT invariance.| File | Dimensione | Formato | |
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