Measurement of the KL meson lifetime with the KLOE detector

We present a measurement of the KL lifetime using the KLOE detector. From a sample of ∼4×108KSKL pairs following the reaction e+e−→ϕ→KSKL we select ∼15×106KL→π0π0π0 decays tagged by KS→π+π− events. From a fit of the proper time distribution we find τL=(50.92±0.17stat±0.25syst) ns. This is the most p...

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Published inPhysics letters. B Vol. 626; no. 1-4; pp. 15 - 23
Main Authors Ambrosino, F., Antonelli, A., Antonelli, M., Bacci, C., Beltrame, P., Bencivenni, G., Bertolucci, S., Bini, C., Bloise, C., Bocci, V., Bossi, F., Bowring, D., Branchini, P., Caloi, R., Campana, P., Capon, G., Capussela, T., Ceradini, F., Chi, S., Chiefari, G., Ciambrone, P., Conetti, S., De Lucia, E., De Santis, A., De Simone, P., De Zorzi, G., Dell'Agnello, S., Denig, A., Di Domenico, A., Di Donato, C., Di Falco, S., Di Micco, B., Doria, A., Dreucci, M., Felici, G., Ferrari, A., Ferrer, M.L., Finocchiaro, G., Forti, C., Franzini, P., Gatti, C., Gauzzi, P., Giovannella, S., Gorini, E., Graziani, E., Incagli, M., Kluge, W., Kulikov, V., Lacava, F., Lanfranchi, G., Lee-Franzini, J., Leone, D., Martini, M., Massarotti, P., Mei, W., Meola, S., Miscetti, S., Moulson, M., Müller, S., Murtas, F., Napolitano, M., Nguyen, F., Palutan, M., Pasqualucci, E., Passeri, A., Patera, V., Perfetto, F., Pontecorvo, L., Primavera, M., Santangelo, P., Santovetti, E., Saracino, G., Sciascia, B., Sciubba, A., Scuri, F., Sfiligoi, I., Spadaro, T., Testa, M., Tortora, L., Valente, P., Valeriani, B., Venanzoni, G., Veneziano, S., Ventura, A., Versaci, R., Xu, G.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 20.10.2005
Elsevier Science
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Summary:We present a measurement of the KL lifetime using the KLOE detector. From a sample of ∼4×108KSKL pairs following the reaction e+e−→ϕ→KSKL we select ∼15×106KL→π0π0π0 decays tagged by KS→π+π− events. From a fit of the proper time distribution we find τL=(50.92±0.17stat±0.25syst) ns. This is the most precise measurement of the KL lifetime performed to date.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2005.08.022