E-viri
Celotno besedilo
Odprti dostop
  • 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; Ciambrone, P; Curciarello, F; Czerwiński, E; D'Agostini, G; Danè, E; De Leo, V; De Lucia, E; De Santis, A; De Simone, P; Di Cicco, A; Di Domenico, A; Domenici, D; D'Uffizi, A; Fantini, A; Fantini, G; Fermani, P; Fiore, S; Gajos, A; Gauzzi, P; Giovannella, S; Graziani, E; Ivanov, V. L; Johansson, T; Kang, X; Kisielewska-Kamińska, D; Kozyrev, E. A; Krzemień, W; Kupść, A; Loffredo, S; Lukin, P. A; Mandaglio, G; Martini, M; Messi, R; Miscetti, S; Moricciani, D; Moskal, P; Passeri, A; Patera, V; del Rio, E. Perez; Raha, N; Santangelo, P; Schioppa, M; Selce, A; Silarski, M; Sirghi, F; Solodov, E. P; Tortora, L; Venanzoni, G; Wiślicki, W; Wolke, M

    06/2018
    Journal Article

    Using 1.63 fb$^{-1}$ of integrated luminosity collected by the KLOE experiment about $7\times 10^4$ $K_S \rightarrow \pi^{\pm}e^{\mp}\nu$ 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.

Vnos na polico