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

Anastasi, A.; Babusci, D.; Berłowski, M.; Bloise, C.; Bossi, F.; Branchini, P.; Budano, A.; Cao, B.; Capon, G.; Ceradini, F.

doi:10.1007/JHEP09(2018)021

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

KLOE-2

Collaboration

•

A. Anastasi
(
- Messina U. and
- Frascati
)

Jun 22, 2018

17 pages

Published in:

JHEP 09 (2018) 021

Published: Sep 5, 2018

e-Print:

1806.08654 [hep-ex]

DOI:

10.1007/JHEP09(2018)021

PDG:

{{\mathit A}_{{{S}}}}

= [

\Gamma\mathrm {( {{\mathit K}_S^0} \rightarrow {{\mathit \pi}^{-}} {{\mathit e}^{+}} {{\mathit \nu}_{{{e}}}})} - \Gamma\mathrm {( {{\mathit K}_S^0} \rightarrow {{\mathit \pi}^{+}} {{\mathit e}^{-}} {{\overline{\mathit \nu}}_{{{e}}}})}

] / SUM

Experiments:

FRASCATI-DAFNE-KLOE-2

View in:

ADS Abstract Service

reference search29 citations

Citations per year

Abstract: (Springer)

Using 1.63 fb

^{−1}

of integrated luminosity collected by the KLOE experiment about 7 × 10

^{4}

K

_{S}

→ π

^{±}

e

^{∓}

ν decays have been reconstructed. The measured value of the charge asymmetry for this decay is A

_{S}

= (−4.9 ± 5.7

_{stat}

± 2.6

_{syst}

) × 10

^{−3}

, which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives A

_{S}

= (−3.8 ± 5.0

_{stat}

± 2.6

_{syst}

) × 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.

Note:

submitted to JHEP •
Submitted to JHEP

CP violation
e+-e- Experiments
Flavor physics
electron positron: annihilation
electron positron: colliding beams
Phi(1020): electroproduction
K0: pair production
charge: asymmetry
invariance: CPT
CP: violation

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Measurement of the charge asymmetry for the KS→πeνK_S \rightarrow \pi e \nuKS​→πeν decay and test of CPT symmetry with the KLOE detector

Citations per year

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