Direct tests of T, CP, CPT symmetries in transitions of neutral K mesons with the KLOE experiment
| Autor: | Babusci, D., Berłowski, M., Bloise, C., Bossi, F., Branchini, P., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, E., D'Agostini, G., D'Amico, R., Danè, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Domenico, A., Diociaiuti, E., Domenici, D., D'Uffizi, A., Fantini, G., Gajos, A., Gamrat, S., Gauzzi, P., Giovannella, S., Graziani, E., Kang, X., Kupść, A., Mandaglio, G., Martini, M., Miscetti, S., Moskal, P., Passeri, A., del Rio, E. Pérez, Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Wiślicki, W., Wolke, M., Bernabéu, J. |
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| Rok vydání: | 2022 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Tests of the T, CP and CPT symmetries in the neutral kaon system are performed by the direct comparison of the probabilities of a kaon transition process to its symmetry-conjugate. The exchange of in and out states required for a genuine test involving an anti-unitary transformation implied by time-reversal is implemented exploiting the entanglement of $K^0\bar{K}{}^0$ pairs produced at a $\phi$-factory. A data sample collected by the KLOE experiment at DA$\Phi$NE corresponding to an integrated luminosity of about 1.7 fb$^{-1}$ is analysed to study the $\Delta$t distributions of the $\phi\to K_{S}K_{L}\to \pi^+\pi^- \: \pi^{\pm}e^{\mp}\nu$ and $\phi\to K_{S}K_{L}\to \pi^{\pm}e^{\mp}\nu \: 3\pi^0$ processes, with $\Delta$t the difference of the kaon decay times. A comparison of the measured $\Delta$t distributions in the asymptotic region $\Delta t \gg \tau_{S}$ allows to test for the first time T and CPT symmetries in kaon transitions with a precision of few percent, and to observe CP violation with this novel method. Comment: 26 pages, 10 figures. Minor style corrections applied before journal submission. Sumbmitted to Physics Letters B |
| Databáze: | arXiv |
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