We present the measurement of the ratio R =r(K0 e3γ;e *30MeV,θ* 20) F (K0 e3(γ))and a first measurement of the direct emission contribution for the same process. We use 328 pb-1 of data collected at KLOE in 2001 and 2002, corresponding to about 3 million of K0 e3(γ) events and about 9 thousand K0 e3γ radiative events. Our result is R= (924± 23stat±16syst)×10-5 for the branching ratio and hXi = -2.3±1.3stat±1.4syst for the parameter describing direct emission. key words: direct emission.
A Study of the radiative KL → π±e ±ν(γ) decay and possible osservation of direct photon emission with the KLOE detector / Ambrosino, F.; Corvino, M.; Massarotti, P.; Mirra, M.; Napolitano, M.; Saracino, G.. - (2007). (Intervento presentato al convegno 23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007 tenutosi a Daegu, kor nel 2007).
A Study of the radiative KL → π±e ±ν(γ) decay and possible osservation of direct photon emission with the KLOE detector
Ambrosino F.;Corvino M.;Massarotti P.;Napolitano M.;Saracino G.
2007
Abstract
We present the measurement of the ratio R =r(K0 e3γ;e *30MeV,θ* 20) F (K0 e3(γ))and a first measurement of the direct emission contribution for the same process. We use 328 pb-1 of data collected at KLOE in 2001 and 2002, corresponding to about 3 million of K0 e3(γ) events and about 9 thousand K0 e3γ radiative events. Our result is R= (924± 23stat±16syst)×10-5 for the branching ratio and hXi = -2.3±1.3stat±1.4syst for the parameter describing direct emission. key words: direct emission.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
