Published November 18, 2004
| Version v1
Journal article
Measurement of the branching ratio of the decay KL->π+/-e-bar ν and extraction of the CKM parameter vertical bar Vus vertical bar
Creators
- 1. Dipartimento di Fisica dell'Universita e Sezione dell'INFN di Cagliari, I-09100 Cagliari (Italy)
- 2. Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE (United Kingdom)
Description
We present a new measurement of the branching ratio R of the decay KL->π+/-e-bar ν, denoted as Ke3, relative to all charged KL decays with two tracks, based on data taken with the NA48 detector at the CERN SPS. We measure R=0.4978+/-0.0035. From this we derive the Ke3 branching fraction and the weak coupling parameter vertical bar Vus vertical bar in the CKM matrix. We obtain vertical bar Vus vertical bar f+(0)=0.2146+/-0.0016, where f+(0) is the vector form factor in the Ke3 decay
Additional details
Identifiers
- DOI
- 10.1016/j.physletb.2004.09.056;
- arXiv
- arXiv:hep-ex/0410059v1;
- PII
- S0370-2693(04)01395-4;
Publishing Information
- Journal Title
- Physics Letters. Section B
- Journal Volume
- 602
- Journal Issue
- 1-2
- Journal Page Range
- p. 41-51
- ISSN
- 0370-2693
- CODEN
- PYLBAJ
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38011111
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- BRANCHING RATIO; CERN SPS SYNCHROTRON; ELECTRONS; FORM FACTORS; KAONS NEUTRAL LONG-LIVED; KOBAYASHI-MASKAWA MATRIX; NEUTRINOS; PARTICLE DECAY; PARTICLE TRACKS; PIONS PLUS
- Descriptors DEC
- ACCELERATORS; BOSONS; CYCLIC ACCELERATORS; DECAY; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; KAONS; KAONS NEUTRAL; LEPTONS; MASSLESS PARTICLES; MATRICES; MESONS; PARTICLE PROPERTIES; PIONS; PSEUDOSCALAR MESONS; STRANGE MESONS; STRANGE PARTICLES; SYNCHROTRONS
Optional Information
- Copyright
- Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.