Published December 2009
| Version v1
Journal article
Precise measurement of Γ(K→e ν(γ))/Γ(K→μ ν(γ)) and study of K→e ν γ
Creators
- Ambrosino, F.1, 2
- Massarotti, P.1, 2
- Meola, S.1, 2
- Napolitano, M.1, 2
- Antonelli, A.3
- Antonelli, M.3
- Bencivenni, G.3
- Bloise, C.3
- Bossi, F.3
- Capon, G.3
- Capussela, T.3
- Ciambrone, P.3
- De Lucia, E.3
- De Simone, P.3
- Dreucci, M.3
- Felici, G.3
- Gatti, C.3
- Giovannella, S.3
- Jacewicz, M.3
- Lanfranchi, G.3
- Miscetti, S.3
- Moulson, M.3
- Murtas, F.3
- Palutan, M.3
- Santangelo, P.3
- Sciascia, B.3
- Sibidanov, A.3
- Spadaro, T.3
- Venanzoni, G.3
- Archilli, F.4, 5
- Beltrame, P.6
- Denig, A.6
- Mueller, S.6
- Bini, C.7, 8
- De Santis, A.7, 8
- De Zorzi, G.7, 8
- Di Domenico, A.7, 8
- Fiore, S.7, 8
- Franzini, P.7, 8
- Gauzzi, P.7, 8
- Bocchetta, S.9, 10
- Ceradini, F.9, 10
- Di Micco, B.9, 10
- Nguyen, F.9, 10
- Branchini, P.9
- Graziani, E.9
- Passeri, A.9
- Tortora, L.9
- Capriotti, D.10
- Di Donato, C.1
- Kulikov, V.11
- Lee-Franzini, J.12, 3
- Martini, M.13, 3
- Patera, V.13, 3
- Versaci, R.13, 3
- Valente, P.7
- KLOE Collaboration
- 1. INFN Sezione di Napoli, Napoli (Italy)
- 2. Dipartimento di Scienze Fisiche dell'Universita ''Federico II'', Napoli (Italy)
- 3. Laboratori Nazionali di Frascati dell'INFN, Frascati (Italy)
- 4. INFN Sezione di Roma Tor Vergata, Rome (Italy)
- 5. Dipartimento di Fisica dell'Universita ''Tor Vergata'', Rome (Italy)
- 6. Johannes Gutenberg-Universitaet, Institut fuer Kernphysik, Mainz (Germany)
- 7. INFN Sezione di Roma, Rome (Italy)
- 8. Dipartimento di Fisica dell'Universita ''La Sapienza'', Rome (Italy)
- 9. INFN Sezione di Roma Tre, Rome (Italy)
- 10. Dipartimento di Fisica dell'Universita ''Roma Tre'', Rome (Italy)
- 11. Institute for Theoretical and Experimental Physics, Moscow (Russian Federation)
- 12. State University of New York, Physics Department, Stony Brook (United States)
- 13. Dipartimento di Energetica dell'Universita ''La Sapienza'', Rome (Italy)
Description
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 DA ΦNE for an integrated luminosity of 2.2 fb-1. We find RK=(2.493±0.025stat±0.019syst) x 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 d Γ(K→eνγ)/dEγ for photon energies 10<Eγ<250 MeV. Results are compared with predictions from theory. (orig.)
Availability note (English)
Available from: http://dx.doi.org/10.1140/epjc/s10052-009-1177-xAdditional details
Identifiers
Publishing Information
- Journal Title
- European Physical Journal. C
- Journal Volume
- 64
- Journal Issue
- 4
- Journal Page Range
- p. 627-636
- ISSN
- 1434-6044
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 41000060
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BRANCHING RATIO; ENERGY SPECTRA; EXPERIMENTAL DATA; GAMMA SPECTRA; KAONS; LEPTONIC DECAY; MUON NUMBER; PARTICLE WIDTHS; RADIATIVE DECAY; STANDARD MODEL; SUPERSYMMETRY; SYMMETRY BREAKING
- Descriptors DEC
- BASIC INTERACTIONS; BOSONS; DATA; DECAY; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; FIELD THEORIES; GRAND UNIFIED THEORY; HADRONS; INFORMATION; INTERACTIONS; LEPTON NUMBER; MATHEMATICAL MODELS; MESONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE MODELS; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; SPECTRA; STRANGE MESONS; STRANGE PARTICLES; SYMMETRY; UNIFIED GAUGE MODELS; WEAK INTERACTIONS; WEAK PARTICLE DECAY
Optional Information
- Collaborations
- KLOE Collaboration