Published August 26, 2011
| Version v1
Journal article
Observation of the rare η→e+e-e+e- decay with the KLOE experiment
Creators
- Ambrosino, F.1, 2
- Antonelli, A.3
- Antonelli, M.3
- Archilli, F.4, 5
- Balwierz, I.6
- Bencivenni, G.3
- Bini, C.7, 8
- Bloise, C.3
- Bocchetta, S.9, 10
- Bossi, F.3
- Branchini, P.9
- Capon, G.3
- Capussela, T.3
- Ceradini, F.9, 10
- Ciambrone, P.3
- Czerwinski, E.3
- De Lucia, E.3
- De Santis, A.7, 8
- De Simone, P.3
- De Zorzi, G.7, 8
- and others
- 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, Roma (Italy)
- 5. Dipartimento di Fisica dell'Universita 'Tor Vergata, Roma (Italy)
- 6. Institute of Physics, Jagiellonian University, Krakow (Poland)
- 7. INFN Sezione di Roma, Roma (Italy)
- 8. Dipartimento di Fisica dell'Universita 'Sapienza', Roma (Italy)
- 9. INFN Sezione di Roma Tre, Roma (Italy)
- 10. Dipartimento di Fisica dell'Universita 'Roma Tre', Roma (Italy)
Description
We report the first observation of the rare η→e+e-e+e-(γ) decay based on 1.7 fb-1 collected by the KLOE experiment at the DAΦNE φ-factory. The selection of the e+e-e+e- final state is fully inclusive of radiation. We have identified 362±29 events resulting in a branching ratio of (2.4±0.2stat+bckg±0.1syst)x10-5.
Availability note (English)
Available from http://dx.doi.org/10.1016/j.physletb.2011.07.033Additional details
Identifiers
- DOI
- 10.1016/j.physletb.2011.07.033;
- arXiv
- arXiv:1105.6067v3;
- PII
- S0370-2693(11)00823-9;
Publishing Information
- Journal Title
- Physics Letters. Section B
- Journal Volume
- 702
- Journal Issue
- 5
- Journal Page Range
- p. 324-328
- ISSN
- 0370-2693
- CODEN
- PYLBAJ
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 43057437
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BRANCHING RATIO; COLLISIONS; ELECTRONS; EXPERIMENTAL DATA; GAMMA DECAY; POSITRONS
- Descriptors DEC
- ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; DATA; DECAY; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; FERMIONS; INFORMATION; LEPTONS; MATTER; NUCLEAR DECAY; NUMERICAL DATA
Optional Information
- Copyright
- Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.