Searches for new particles produced in Z boson decay

Conference · Tue May 01 04:00:00 EDT 1990

OSTI ID:6803915

Van Kooten, R; Jung, C K; Komamiya, S

Searches for events with new particle topologies in 455 hadronic Z decays with the Mark 2 detector at SLC are presented. 95% confidence level lower limits of 40.7 GeV/c{sup 2} for the top quark mass and 42.0 GeV/c{sup 2} for the mass of a fourth generation charge - 1/3 quark, regardless of decay mode, are obtained. For a fourth generation sequential Dirac neutrino {nu}{sub 4} mass up to 43 GeV/c{sup 2}. Decays of the Z boson to a pair of non-minimal Higgs bosons (Z {yields} H{sub s}{sup 0}H{sub p}{sup 0}), where one of them is relatively light ({approx lt} 10 GeV/c{sup 2}), are also considered. Limits are obtained on the ZH{sub s}{sup 0}H{sub p}{sup 0} coupling as a function of the Higgs boson masses. 11 refs., 2 figs., 2 tabs.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6803915
• Report Number(s): SLAC-PUB-5246; CONF-900135--15; ON: DE90013572
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BOSONS
DECAY
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRONIC PARTICLE DECAY
HADRONS
HIGGS BOSONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTON-LEPTON INTERACTIONS
MATRIX ELEMENTS
NEUTRONS
NUCLEONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUARKS
SLC DETECTORS
TOP PARTICLES
Z NEUTRAL BOSONS