Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ

Abstract We present a precise measurement of the ratio RK=Γ(K→eν(γ))/Γ(K→μν(γ)) and a study of the radiative process K→eνγ, performed with the KLOE detector. The results are based on data collected at the Frascati e+e− collider DAΦNE for an integrated luminosity of 2.2 $ fb^{−1} $. We find RK=(2.493...
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Autor*in:	Ambrosino, F. [verfasserIn] Antonelli, A. Antonelli, M. Archilli, F. Beltrame, P. Bencivenni, G. Bini, C. Bloise, C. Bocchetta, S. Bossi, F. Branchini, P. Capon, G. Capriotti, D. Capussela, T. Ceradini, F. Ciambrone, P. De Lucia, E. De Santis, A. De Simone, P. De Zorzi, G. Denig, A. Di Domenico, A. Di Donato, C. Di Micco, B. 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. Müller, S. Murtas, F. Napolitano, M. Nguyen, F. Palutan, M. Passeri, A. Patera, V. Santangelo, P. Sciascia, B. Sibidanov, A. Spadaro, T. Tortora, L. Valente, P. Venanzoni, G. Versaci, R.

Format:	Artikel
Sprache:	Englisch

Erschienen:	2009

Anmerkung:	© Springer-Verlag / Società Italiana di Fisica 2009

Übergeordnetes Werk:	Enthalten in: The European physical journal / C - Springer-Verlag, 1998, 64(2009), 4 vom: 28. Okt., Seite 627-636
Übergeordnetes Werk:	volume:64 ; year:2009 ; number:4 ; day:28 ; month:10 ; pages:627-636

Links:	Volltext

DOI / URN:	10.1140/epjc/s10052-009-1177-x

Katalog-ID:	OLC2069098931

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700	1		\|a Franzini, P. \|4 aut
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700	1		\|a Murtas, F. \|4 aut
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allfields	10.1140/epjc/s10052-009-1177-x doi (DE-627)OLC2069098931 (DE-He213)s10052-009-1177-x-p DE-627 ger DE-627 rakwb eng 530 VZ 530 VZ Ambrosino, F. verfasserin aut Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ 2009 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag / Società Italiana di Fisica 2009 Abstract We present a precise measurement of the ratio RK=Γ(K→eν(γ))/Γ(K→μν(γ)) and a study of the radiative process K→eνγ, performed with the KLOE detector. The results are based on data collected at the Frascati e+e− collider DAΦNE for an integrated luminosity of 2.2 $ fb^{−1} $. We find RK=(2.493±0.$ 025_{stat} $±0.$ 019_{syst} $)×$ 10^{−5} $, in agreement with the Standard Model expectation. This result is used to improve constraints on parameters of the Minimal Supersymmetric Standard Model with lepton flavor violation. We also measured the differential decay rate dΓ(K→eνγ)/dEγ for photon energies 10<Eγ< 250 MeV. Results are compared with predictions from theory. Antonelli, A. aut Antonelli, M. aut Archilli, F. aut Beltrame, P. aut Bencivenni, G. aut Bini, C. aut Bloise, C. aut Bocchetta, S. aut Bossi, F. aut Branchini, P. aut Capon, G. aut Capriotti, D. aut Capussela, T. aut Ceradini, F. aut Ciambrone, P. aut De Lucia, E. aut De Santis, A. aut De Simone, P. aut De Zorzi, G. aut Denig, A. aut Di Domenico, A. aut Di Donato, C. aut Di Micco, B. aut Dreucci, M. aut Felici, G. aut Fiore, S. aut Franzini, P. aut Gatti, C. aut Gauzzi, P. aut Giovannella, S. aut Graziani, E. aut Jacewicz, M. aut Kulikov, V. aut Lanfranchi, G. aut Lee-Franzini, J. aut Martini, M. aut Massarotti, P. aut Meola, S. aut Miscetti, S. aut Moulson, M. aut Müller, S. aut Murtas, F. aut Napolitano, M. aut Nguyen, F. aut Palutan, M. aut Passeri, A. aut Patera, V. aut Santangelo, P. aut Sciascia, B. aut Sibidanov, A. aut Spadaro, T. aut Tortora, L. aut Valente, P. aut Venanzoni, G. aut Versaci, R. aut Enthalten in The European physical journal / C Springer-Verlag, 1998 64(2009), 4 vom: 28. Okt., Seite 627-636 (DE-627)235469777 (DE-600)1397769-6 (DE-576)061879150 1434-6044 nnns volume:64 year:2009 number:4 day:28 month:10 pages:627-636 https://doi.org/10.1140/epjc/s10052-009-1177-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_20 GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_70 GBV_ILN_267 GBV_ILN_2003 GBV_ILN_2018 GBV_ILN_4116 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4317 AR 64 2009 4 28 10 627-636
spelling	10.1140/epjc/s10052-009-1177-x doi (DE-627)OLC2069098931 (DE-He213)s10052-009-1177-x-p DE-627 ger DE-627 rakwb eng 530 VZ 530 VZ Ambrosino, F. verfasserin aut Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ 2009 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag / Società Italiana di Fisica 2009 Abstract We present a precise measurement of the ratio RK=Γ(K→eν(γ))/Γ(K→μν(γ)) and a study of the radiative process K→eνγ, performed with the KLOE detector. The results are based on data collected at the Frascati e+e− collider DAΦNE for an integrated luminosity of 2.2 $ fb^{−1} $. We find RK=(2.493±0.$ 025_{stat} $±0.$ 019_{syst} $)×$ 10^{−5} $, in agreement with the Standard Model expectation. This result is used to improve constraints on parameters of the Minimal Supersymmetric Standard Model with lepton flavor violation. We also measured the differential decay rate dΓ(K→eνγ)/dEγ for photon energies 10<Eγ< 250 MeV. Results are compared with predictions from theory. Antonelli, A. aut Antonelli, M. aut Archilli, F. aut Beltrame, P. aut Bencivenni, G. aut Bini, C. aut Bloise, C. aut Bocchetta, S. aut Bossi, F. aut Branchini, P. aut Capon, G. aut Capriotti, D. aut Capussela, T. aut Ceradini, F. aut Ciambrone, P. aut De Lucia, E. aut De Santis, A. aut De Simone, P. aut De Zorzi, G. aut Denig, A. aut Di Domenico, A. aut Di Donato, C. aut Di Micco, B. aut Dreucci, M. aut Felici, G. aut Fiore, S. aut Franzini, P. aut Gatti, C. aut Gauzzi, P. aut Giovannella, S. aut Graziani, E. aut Jacewicz, M. aut Kulikov, V. aut Lanfranchi, G. aut Lee-Franzini, J. aut Martini, M. aut Massarotti, P. aut Meola, S. aut Miscetti, S. aut Moulson, M. aut Müller, S. aut Murtas, F. aut Napolitano, M. aut Nguyen, F. aut Palutan, M. aut Passeri, A. aut Patera, V. aut Santangelo, P. aut Sciascia, B. aut Sibidanov, A. aut Spadaro, T. aut Tortora, L. aut Valente, P. aut Venanzoni, G. aut Versaci, R. aut Enthalten in The European physical journal / C Springer-Verlag, 1998 64(2009), 4 vom: 28. Okt., Seite 627-636 (DE-627)235469777 (DE-600)1397769-6 (DE-576)061879150 1434-6044 nnns volume:64 year:2009 number:4 day:28 month:10 pages:627-636 https://doi.org/10.1140/epjc/s10052-009-1177-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_20 GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_70 GBV_ILN_267 GBV_ILN_2003 GBV_ILN_2018 GBV_ILN_4116 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4317 AR 64 2009 4 28 10 627-636
allfields_unstemmed	10.1140/epjc/s10052-009-1177-x doi (DE-627)OLC2069098931 (DE-He213)s10052-009-1177-x-p DE-627 ger DE-627 rakwb eng 530 VZ 530 VZ Ambrosino, F. verfasserin aut Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ 2009 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag / Società Italiana di Fisica 2009 Abstract We present a precise measurement of the ratio RK=Γ(K→eν(γ))/Γ(K→μν(γ)) and a study of the radiative process K→eνγ, performed with the KLOE detector. The results are based on data collected at the Frascati e+e− collider DAΦNE for an integrated luminosity of 2.2 $ fb^{−1} $. We find RK=(2.493±0.$ 025_{stat} $±0.$ 019_{syst} $)×$ 10^{−5} $, in agreement with the Standard Model expectation. This result is used to improve constraints on parameters of the Minimal Supersymmetric Standard Model with lepton flavor violation. We also measured the differential decay rate dΓ(K→eνγ)/dEγ for photon energies 10<Eγ< 250 MeV. Results are compared with predictions from theory. Antonelli, A. aut Antonelli, M. aut Archilli, F. aut Beltrame, P. aut Bencivenni, G. aut Bini, C. aut Bloise, C. aut Bocchetta, S. aut Bossi, F. aut Branchini, P. aut Capon, G. aut Capriotti, D. aut Capussela, T. aut Ceradini, F. aut Ciambrone, P. aut De Lucia, E. aut De Santis, A. aut De Simone, P. aut De Zorzi, G. aut Denig, A. aut Di Domenico, A. aut Di Donato, C. aut Di Micco, B. aut Dreucci, M. aut Felici, G. aut Fiore, S. aut Franzini, P. aut Gatti, C. aut Gauzzi, P. aut Giovannella, S. aut Graziani, E. aut Jacewicz, M. aut Kulikov, V. aut Lanfranchi, G. aut Lee-Franzini, J. aut Martini, M. aut Massarotti, P. aut Meola, S. aut Miscetti, S. aut Moulson, M. aut Müller, S. aut Murtas, F. aut Napolitano, M. aut Nguyen, F. aut Palutan, M. aut Passeri, A. aut Patera, V. aut Santangelo, P. aut Sciascia, B. aut Sibidanov, A. aut Spadaro, T. aut Tortora, L. aut Valente, P. aut Venanzoni, G. aut Versaci, R. aut Enthalten in The European physical journal / C Springer-Verlag, 1998 64(2009), 4 vom: 28. Okt., Seite 627-636 (DE-627)235469777 (DE-600)1397769-6 (DE-576)061879150 1434-6044 nnns volume:64 year:2009 number:4 day:28 month:10 pages:627-636 https://doi.org/10.1140/epjc/s10052-009-1177-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_20 GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_70 GBV_ILN_267 GBV_ILN_2003 GBV_ILN_2018 GBV_ILN_4116 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4317 AR 64 2009 4 28 10 627-636
allfieldsGer	10.1140/epjc/s10052-009-1177-x doi (DE-627)OLC2069098931 (DE-He213)s10052-009-1177-x-p DE-627 ger DE-627 rakwb eng 530 VZ 530 VZ Ambrosino, F. verfasserin aut Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ 2009 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag / Società Italiana di Fisica 2009 Abstract We present a precise measurement of the ratio RK=Γ(K→eν(γ))/Γ(K→μν(γ)) and a study of the radiative process K→eνγ, performed with the KLOE detector. The results are based on data collected at the Frascati e+e− collider DAΦNE for an integrated luminosity of 2.2 $ fb^{−1} $. We find RK=(2.493±0.$ 025_{stat} $±0.$ 019_{syst} $)×$ 10^{−5} $, in agreement with the Standard Model expectation. This result is used to improve constraints on parameters of the Minimal Supersymmetric Standard Model with lepton flavor violation. We also measured the differential decay rate dΓ(K→eνγ)/dEγ for photon energies 10<Eγ< 250 MeV. Results are compared with predictions from theory. Antonelli, A. aut Antonelli, M. aut Archilli, F. aut Beltrame, P. aut Bencivenni, G. aut Bini, C. aut Bloise, C. aut Bocchetta, S. aut Bossi, F. aut Branchini, P. aut Capon, G. aut Capriotti, D. aut Capussela, T. aut Ceradini, F. aut Ciambrone, P. aut De Lucia, E. aut De Santis, A. aut De Simone, P. aut De Zorzi, G. aut Denig, A. aut Di Domenico, A. aut Di Donato, C. aut Di Micco, B. aut Dreucci, M. aut Felici, G. aut Fiore, S. aut Franzini, P. aut Gatti, C. aut Gauzzi, P. aut Giovannella, S. aut Graziani, E. aut Jacewicz, M. aut Kulikov, V. aut Lanfranchi, G. aut Lee-Franzini, J. aut Martini, M. aut Massarotti, P. aut Meola, S. aut Miscetti, S. aut Moulson, M. aut Müller, S. aut Murtas, F. aut Napolitano, M. aut Nguyen, F. aut Palutan, M. aut Passeri, A. aut Patera, V. aut Santangelo, P. aut Sciascia, B. aut Sibidanov, A. aut Spadaro, T. aut Tortora, L. aut Valente, P. aut Venanzoni, G. aut Versaci, R. aut Enthalten in The European physical journal / C Springer-Verlag, 1998 64(2009), 4 vom: 28. Okt., Seite 627-636 (DE-627)235469777 (DE-600)1397769-6 (DE-576)061879150 1434-6044 nnns volume:64 year:2009 number:4 day:28 month:10 pages:627-636 https://doi.org/10.1140/epjc/s10052-009-1177-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_20 GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_70 GBV_ILN_267 GBV_ILN_2003 GBV_ILN_2018 GBV_ILN_4116 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4317 AR 64 2009 4 28 10 627-636
allfieldsSound	10.1140/epjc/s10052-009-1177-x doi (DE-627)OLC2069098931 (DE-He213)s10052-009-1177-x-p DE-627 ger DE-627 rakwb eng 530 VZ 530 VZ Ambrosino, F. verfasserin aut Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ 2009 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag / Società Italiana di Fisica 2009 Abstract We present a precise measurement of the ratio RK=Γ(K→eν(γ))/Γ(K→μν(γ)) and a study of the radiative process K→eνγ, performed with the KLOE detector. The results are based on data collected at the Frascati e+e− collider DAΦNE for an integrated luminosity of 2.2 $ fb^{−1} $. We find RK=(2.493±0.$ 025_{stat} $±0.$ 019_{syst} $)×$ 10^{−5} $, in agreement with the Standard Model expectation. This result is used to improve constraints on parameters of the Minimal Supersymmetric Standard Model with lepton flavor violation. We also measured the differential decay rate dΓ(K→eνγ)/dEγ for photon energies 10<Eγ< 250 MeV. Results are compared with predictions from theory. Antonelli, A. aut Antonelli, M. aut Archilli, F. aut Beltrame, P. aut Bencivenni, G. aut Bini, C. aut Bloise, C. aut Bocchetta, S. aut Bossi, F. aut Branchini, P. aut Capon, G. aut Capriotti, D. aut Capussela, T. aut Ceradini, F. aut Ciambrone, P. aut De Lucia, E. aut De Santis, A. aut De Simone, P. aut De Zorzi, G. aut Denig, A. aut Di Domenico, A. aut Di Donato, C. aut Di Micco, B. aut Dreucci, M. aut Felici, G. aut Fiore, S. aut Franzini, P. aut Gatti, C. aut Gauzzi, P. aut Giovannella, S. aut Graziani, E. aut Jacewicz, M. aut Kulikov, V. aut Lanfranchi, G. aut Lee-Franzini, J. aut Martini, M. aut Massarotti, P. aut Meola, S. aut Miscetti, S. aut Moulson, M. aut Müller, S. aut Murtas, F. aut Napolitano, M. aut Nguyen, F. aut Palutan, M. aut Passeri, A. aut Patera, V. aut Santangelo, P. aut Sciascia, B. aut Sibidanov, A. aut Spadaro, T. aut Tortora, L. aut Valente, P. aut Venanzoni, G. aut Versaci, R. aut Enthalten in The European physical journal / C Springer-Verlag, 1998 64(2009), 4 vom: 28. Okt., Seite 627-636 (DE-627)235469777 (DE-600)1397769-6 (DE-576)061879150 1434-6044 nnns volume:64 year:2009 number:4 day:28 month:10 pages:627-636 https://doi.org/10.1140/epjc/s10052-009-1177-x lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_20 GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_70 GBV_ILN_267 GBV_ILN_2003 GBV_ILN_2018 GBV_ILN_4116 GBV_ILN_4277 GBV_ILN_4305 GBV_ILN_4317 AR 64 2009 4 28 10 627-636
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spellingShingle	Ambrosino, F. ddc 530 Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ
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topic_title	530 VZ Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ
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title	Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ
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author_browse	Ambrosino, F. Antonelli, A. Antonelli, M. Archilli, F. Beltrame, P. Bencivenni, G. Bini, C. Bloise, C. Bocchetta, S. Bossi, F. Branchini, P. Capon, G. Capriotti, D. Capussela, T. Ceradini, F. Ciambrone, P. De Lucia, E. De Santis, A. De Simone, P. De Zorzi, G. Denig, A. Di Domenico, A. Di Donato, C. Di Micco, B. 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. Müller, S. Murtas, F. Napolitano, M. Nguyen, F. Palutan, M. Passeri, A. Patera, V. Santangelo, P. Sciascia, B. Sibidanov, A. Spadaro, T. Tortora, L. Valente, P. Venanzoni, G. Versaci, R.
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title_sort	precise measurement of γ(k→eν(γ))/γ(k→μν(γ)) and study of k→eνγ
title_auth	Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ
abstract	Abstract We present a precise measurement of the ratio RK=Γ(K→eν(γ))/Γ(K→μν(γ)) and a study of the radiative process K→eνγ, performed with the KLOE detector. The results are based on data collected at the Frascati e+e− collider DAΦNE for an integrated luminosity of 2.2 $ fb^{−1} $. We find RK=(2.493±0.$ 025_{stat} $±0.$ 019_{syst} $)×$ 10^{−5} $, in agreement with the Standard Model expectation. This result is used to improve constraints on parameters of the Minimal Supersymmetric Standard Model with lepton flavor violation. We also measured the differential decay rate dΓ(K→eνγ)/dEγ for photon energies 10<Eγ< 250 MeV. Results are compared with predictions from theory. © Springer-Verlag / Società Italiana di Fisica 2009
abstractGer	Abstract We present a precise measurement of the ratio RK=Γ(K→eν(γ))/Γ(K→μν(γ)) and a study of the radiative process K→eνγ, performed with the KLOE detector. The results are based on data collected at the Frascati e+e− collider DAΦNE for an integrated luminosity of 2.2 $ fb^{−1} $. We find RK=(2.493±0.$ 025_{stat} $±0.$ 019_{syst} $)×$ 10^{−5} $, in agreement with the Standard Model expectation. This result is used to improve constraints on parameters of the Minimal Supersymmetric Standard Model with lepton flavor violation. We also measured the differential decay rate dΓ(K→eνγ)/dEγ for photon energies 10<Eγ< 250 MeV. Results are compared with predictions from theory. © Springer-Verlag / Società Italiana di Fisica 2009
abstract_unstemmed	Abstract We present a precise measurement of the ratio RK=Γ(K→eν(γ))/Γ(K→μν(γ)) and a study of the radiative process K→eνγ, performed with the KLOE detector. The results are based on data collected at the Frascati e+e− collider DAΦNE for an integrated luminosity of 2.2 $ fb^{−1} $. We find RK=(2.493±0.$ 025_{stat} $±0.$ 019_{syst} $)×$ 10^{−5} $, in agreement with the Standard Model expectation. This result is used to improve constraints on parameters of the Minimal Supersymmetric Standard Model with lepton flavor violation. We also measured the differential decay rate dΓ(K→eνγ)/dEγ for photon energies 10<Eγ< 250 MeV. Results are compared with predictions from theory. © Springer-Verlag / Società Italiana di Fisica 2009
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title_short	Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ
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up_date	2024-07-03T20:57:14.917Z
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fullrecord_marcxml	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">OLC2069098931</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230502163833.0</controlfield><controlfield tag="007">tu</controlfield><controlfield tag="008">200819s2009 xx \|\|\|\|\| 00\| \|\|eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1140/epjc/s10052-009-1177-x</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)OLC2069098931</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-He213)s10052-009-1177-x-p</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">530</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">530</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Ambrosino, F.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2009</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">ohne Hilfsmittel zu benutzen</subfield><subfield code="b">n</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Band</subfield><subfield code="b">nc</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="500" ind1=" " ind2=" "><subfield code="a">© Springer-Verlag / Società Italiana di Fisica 2009</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract We present a precise measurement of the ratio RK=Γ(K→eν(γ))/Γ(K→μν(γ)) and a study of the radiative process K→eνγ, performed with the KLOE detector. The results are based on data collected at the Frascati e+e− collider DAΦNE for an integrated luminosity of 2.2 $ fb^{−1} $. We find RK=(2.493±0.$ 025_{stat} $±0.$ 019_{syst} $)×$ 10^{−5} $, in agreement with the Standard Model expectation. This result is used to improve constraints on parameters of the Minimal Supersymmetric Standard Model with lepton flavor violation. We also measured the differential decay rate dΓ(K→eνγ)/dEγ for photon energies 10<Eγ< 250 MeV. 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Precise measurement of Γ(K→eν(γ))/Γ(K→μν(γ)) and study of K→eνγ

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