We present a measurement of the ratio R = Γ(K0 e3γ;E∗ γ > 30 MeV, θ∗ γ > 20◦)/Γ (K0 e3) and a first measurement of the direct emission contribution in semileptonic KL decays. The measurement was performed at the DAΦNE φ factory by selecting φ→KLKS decays with the KLOE detector.We use 328 pb−1 of data, corresponding to about 3.5 million K0 e3 events and about 9000 K0 e3γ radiative events. Our result is R = (924±23stat ±16syst)×10−5 for the branching ratio and X = −2.3±1.3stat ±1.4syst for the effective strength parameter describing direct emission.

A study of the radiative K-L -> pi(+/-)e(-/+)nu gamma decay and search for direct photon emission with the KLOE detector / Ambrosino, F., Antonelli, A., Antonelli, M., Archilli, F., Bacci, C., Beltrame, P., Bencivenni, G., Bertolucci, S., Bini, C., Bloise, C., Bocchetta, S., Bossi, F., Branchini, P., Caloi, R., Campana, P., Capon, G., Capussela, T., Ceradini, F., Cesario, F., Chi, S., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - STAMPA. - 55:4(2008), pp. 539-546. [10.1140/epjc/s10052-008-0634-2]

A study of the radiative K-L -> pi(+/-)e(-/+)nu gamma decay and search for direct photon emission with the KLOE detector

BINI, Cesare;CALOI, Rita;DE SANTIS, ANTONIO;DE ZORZI, Guido;DI DOMENICO, Antonio;FIORE, SALVATORE;FRANZINI, Paolo;GAUZZI, Paolo;LACAVA, Francesco;PATERA, Vincenzo;SCIUBBA, Adalberto;TESTA, Marianna;
2008

Abstract

We present a measurement of the ratio R = Γ(K0 e3γ;E∗ γ > 30 MeV, θ∗ γ > 20◦)/Γ (K0 e3) and a first measurement of the direct emission contribution in semileptonic KL decays. The measurement was performed at the DAΦNE φ factory by selecting φ→KLKS decays with the KLOE detector.We use 328 pb−1 of data, corresponding to about 3.5 million K0 e3 events and about 9000 K0 e3γ radiative events. Our result is R = (924±23stat ±16syst)×10−5 for the branching ratio and X = −2.3±1.3stat ±1.4syst for the effective strength parameter describing direct emission.
2008
01 Pubblicazione su rivista::01a Articolo in rivista
A study of the radiative K-L -> pi(+/-)e(-/+)nu gamma decay and search for direct photon emission with the KLOE detector / Ambrosino, F., Antonelli, A., Antonelli, M., Archilli, F., Bacci, C., Beltrame, P., Bencivenni, G., Bertolucci, S., Bini, C., Bloise, C., Bocchetta, S., Bossi, F., Branchini, P., Caloi, R., Campana, P., Capon, G., Capussela, T., Ceradini, F., Cesario, F., Chi, S., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - STAMPA. - 55:4(2008), pp. 539-546. [10.1140/epjc/s10052-008-0634-2]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/226517
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