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Search for long-lived massive neutrinos in Z decays

Journal Article · · Physical Review Letters; (USA)
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We search for events in the Mark II detector at SLAC Linear Collider with the topology of a {ital Z} boson decaying into a pair of long-lived massive particles. No events that are consistent with the search hypothesis are found. Interpreting the long-lived particle as a sequential Dirac neutrino {nu}{sub 4} of the fourth generation, we exclude at the 95% confidence level a significant range of mixing-matrix elements of {nu}{sub 4} to other-generation neutrinos for a {nu}{sub 4} mass from 10 to 43 GeV/{ital c}{sup 2}.
DOE Contract Number:
AC02-84ER40125; AC03-76SF00098; AC02-76ER01112; AC03-76SF00515
OSTI ID:
6916424
Journal Information:
Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:10; 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
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
DATA
DATA ANALYSIS
DECAY
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
GEV RANGE 10-100
INFORMATION
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
LIFETIME
MASSLESS PARTICLES
MONTE CARLO METHOD
NATIONAL ORGANIZATIONS
NEUTRINOS
NUMERICAL DATA
PARTICLE IDENTIFICATION
PARTICLE INTERACTIONS
STANFORD LINEAR ACCELERATOR CENTER
US DOE
US ERDA
US ORGANIZATIONS
Z NEUTRAL BOSONS