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Search for unstable heavy neutral leptons in e sup + e sup minus annihilations at radical s from 50 to 60. 8 GeV

Journal Article · · Physical Review Letters; (USA)
; ; ; ; ; ; ; ; ;  [1];
  1. University of Rochester, Rochester, NY (USA)
+ Show Author Affiliations
A search for unstable heavy neutral leptons has been made at center-of-mass energies from 50 to 60.8 GeV with the AMY detector at the KEK Storage ring TRISTAN. The neutral leptons are assumed to decay via mixing to electrons and muons. Events with two leptons were searched for. No evidence for their existence was found. Limits in the mass range 7.8{le}{ital M}{sub {ital L}{sup 0}}{le}28.1 GeV/{ital c}{sup 2} and mixing-parameter range 9{times}10{sup {minus}10}{le}{vert bar}U{sub lL}{vert bar}{sup 2}{le}1 are presented for Dirac- and Majorana-type neutrinos.
OSTI ID:
5400571
Journal Information:
Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 63:13; ISSN PRLTA; ISSN 0031-9007
Country of Publication:
United States
Language:
English

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Related Subjects

645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
645102 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
CYCLIC ACCELERATORS
DATA
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
FIELD THEORIES
GEV RANGE
GEV RANGE 10-100
HEAVY LEPTONS
INFORMATION
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
KEK SYNCHROTRON
LEPTON-LEPTON INTERACTIONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MONTE CARLO METHOD
MUONS
NEUTRINOS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
SYNCHROTRONS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
W PLUS BOSONS
WEINBERG-SALAM GAUGE MODEL
Z NEUTRAL BOSONS