Production and decay of heavy top quarks

Technical Report · Tue Aug 01 04:00:00 EDT 1989

DOI:https://doi.org/10.2172/5018921· OSTI ID:5018921

Kauffman, R P

Experimental evidence indicates that the top quark exists and has a mass between 50 and 200 GeV/c{sup 2}. The decays of a top quark with a mass in this range are studied with emphasis placed on the mass region near the threshold for production of real W bosons. Topics discussed are: (1) possible enhancement of strange quark production when M{sub W} + m{sub s} < m{sub t} < M{sub W} + m{sub b}; (2) exclusive decays of T mesons to B and B{asterisk} mesons using the non-relativistic quark model; (3) polarization of intermediate W's in top quark decay as a source of information on the top quark mass. The production of heavy top quarks in an e{sup +}e{sup {minus}} collider with a center-of-mass energy of 2 TeV is studied. The effective-boson approximation for photons, Z{sup 0}'s and W's is reviewed and an analogous approximation for interfaces between photons and Z{sup 0}'s is developed. The cross sections for top quark pair production from photon-photon, photon-Z{sup 0}, Z{sup 0}Z{sup 0}, and W{sup +}W{sup {minus}} fusion are calculated using the effective-boson approximation. Production of top quarks along with anti-bottom quarks via {gamma}W{sup +} and Z{sup 0}W{sup +} fusion is studied. An exact calculation of {gamma}e{sup +} {yields} {bar {nu}}t{bar b} is made and compared with the effective-W approximation. 31 refs., 46 figs.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 5018921
• Report Number(s): SLAC-348; ON: DE90006419
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Weak Interactions &amp; Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
BOSONS
BREMSSTRAHLUNG
COMPOSITE MODELS
CROSS SECTIONS
DECAY
DIAGRAMS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FEYNMAN DIAGRAM
FIELD THEORIES
HADRONS
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
KOBAYASHI-MASKAWA MATRIX
MASS SPECTRA
MATHEMATICAL MODELS
MATRICES
MESONS
PAIR PRODUCTION
PARTICLE DECAY
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUARK MODEL
RADIATIONS
SEMILEPTONIC DECAY
SPECTRA
STRANGE PARTICLES
TOP PARTICLES
UNIFIED-FIELD THEORIES
WEAK PARTICLE DECAY