Published February 23, 2009
| Version v1
Journal article
Search for the KS→e+e- decay with the KLOE detector
Creators
- Ambrosino, F.1, 2
- Antonelli, A.3
- Antonelli, M.3
- Archilli, F.4, 5
- Beltrame, P.6
- Bencivenni, G.3
- Bertolucci, S.3
- Bini, C.7, 8
- Bloise, C.3
- Bocchetta, S.9, 10
- Bossi, F.3
- Branchini, P.9
- Campana, P.3
- Capon, G.3
- Capriotti, D.9, 10
- Capussela, T.3
- Ceradini, F.9, 10
- Ciambrone, P.3
- Crucianelli, F.8
- De Lucia, E.3
- 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. Institut fuer Experimentelle Kernphysik, Universitaet Karlsruhe (Germany)
- 7. INFN Sezione di Roma, Roma (Italy)
- 8. Dipartimento di Fisica dell'Universita 'La Sapienza', Roma (Italy)
- 9. INFN Sezione di Roma Tre, Roma (Italy)
- 10. Dipartimento di Fisica dell'Universita 'Roma Tre', Roma (Italy)
Description
We present the result of a direct search for the decay KS→e+e-, obtained with a sample of e+e-→φ→KSKL events produced at DAΦNE, the Frascati φ-factory, for an integrated luminosity of 1.9 fb-1. The search has been performed using a pure KS beam tagged by the simultaneous detection of a KL interaction in the calorimeter. Background rejection has been optimized by using both kinematic and particle identification cuts. We find BR(KS→e+e-)<9x10-9 at 90% CL, which improves by an order of magnitude on the previous best limit
Availability note (English)
Available from http://dx.doi.org/10.1016/j.physletb.2009.01.037Additional details
Identifiers
- DOI
- 10.1016/j.physletb.2009.01.037;
- arXiv
- arXiv:0707.2687v1;
- PII
- S0370-2693(09)00084-7;
Publishing Information
- Journal Title
- Physics Letters. Section B
- Journal Volume
- 672
- Journal Issue
- 3
- Journal Page Range
- p. 203-208
- ISSN
- 0370-2693
- CODEN
- PYLBAJ
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 40050551
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- BEAM LUMINOSITY; CALORIMETERS; ELECTRONS; KAONS NEUTRAL LONG-LIVED; KAONS NEUTRAL SHORT-LIVED; PAIR PRODUCTION; PARTICLE DECAY; PARTICLE IDENTIFICATION; PHI MESONS; POSITRONS
- Descriptors DEC
- ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BOSONS; DECAY; ELEMENTARY PARTICLES; FERMIONS; HADRONS; INTERACTIONS; KAONS; KAONS NEUTRAL; LEPTONS; MATTER; MEASURING INSTRUMENTS; MESONS; PARTICLE PRODUCTION; PSEUDOSCALAR MESONS; STRANGE MESONS; STRANGE PARTICLES
Optional Information
- Copyright
- Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.