Please use this identifier to cite or link to this item: http://hdl.handle.net/2307/394
Title: Precise measurement of Gamma(K -> e nu(gamma))/Gamma(K -> mu nu(gamma))and study of K -> e nu gamma
Authors: Ambrosino, F.
Antonelli, A.
Antonelli, M.
Archilli, F.
Beltrame, P.
Bencivenni, G.
Bini, C.
Bloise, C.
Bocchetta, Serena
Bossi, F.
Branchini, P.
Capon, G.
Capriotti, D.
Capussela, T.
Ceradini, Filippo
Ciambrone, P.
De Lucia, E.
De Santis, A.
De Simone, P.
De Zorzi, G.
Denig, A.
Di Domenico, A.
Di Donato, C.
Di Micco, Biagio
Dreucci, M.
Felici, G.
Fiore, S.
Franzini, P.
Gatti, C.
Gauzzi, P.
Giovannella, S.
Graziani, E.
Jacewicz, M.
Kulikov, V.
Lanfranchi, G.
Lee-Franzini, J.
Martini, M.
Massarotti, P.
Meola, S.
Miscetti, S.
Moulson, M.
Mueller, S.
Murtas, F.
Napolitano, M.
Nguyen, Federico
Palutan, M.
Passeri, A.
Patera, V.
Santangelo, P.
Sciascia, B.
Sibidanov, A.
Spadaro, T.
Tortora, L.
Valente, P.
Venanzoni, G.
Versaci, R.
Keywords: KLOE EXPERIMENT
RADIATIVE-CORRECTIONS
DECAYS
SIMULATION
DETECTOR
Issue Date: Dec-2009
Publisher: Springer
Source: 3
Abstract: We present a precise measurement of the ratio R-K = Gamma(K -> enu(gamma))/Gamma(K -> mu nu(gamma)) and a study of the radiativeprocess K -> e nu gamma, performed with the KLOE detector. The resultsare based on data collected at the Frascati e(+)e(-) collider DA Phi NEfor an integrated luminosity of 2.2 fb(-1). We find R-K = (2.493 +/-0.025(stat) +/- 0.019(syst)) x 10(-5), in agreement with the StandardModel expectation. This result is used to improve constraints onparameters of the Minimal Supersymmetric Standard Model with leptonflavor violation. We also measured the differential decay rate dGamma(K -> e nu gamma)/dE(gamma) for photon energies 10 < E-gamma < 250MeV. Results are compared with predictions from theory.
URI: http://hdl.handle.net/2307/394
ISSN: 1434-6044
DOI: 10.1140/epjc/s10052-009-1177-x
Appears in Collections:A - Articolo su rivista
X_Dipartimento di Fisica 'Edoardo Amaldi'

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