Search for new heavy quarks at Tristan

Conference · Fri Dec 15 04:00:00 EST 1989 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:7023545

Sakamoto, H ^[1]

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1. National Laboratory for High Energy Physics, KEK, Oho, Tsukuba, Ibaraki 305, Japan (JP)

Study to search new heavy flavors has been considerably progressing at the TRISTAN {ital e}{sup +}{ital e}{sup {minus}} collider as the beam energy has been pushed up. Three general purpose detectors, AMY, TOPAZ and VENUS have accumulated about 25{ital pb}{sup {minus}1} of luminosities at the beam energies from 25 GeV up to 30.4 GeV. {ital R} measurements, event shape analyses, isolated lepton and photon analyses were performed and new mass limits for top and {ital b}{prime} quarks have been obtained. As for {ital b}{prime}, not only the charged current decay mode, but also the flavor changing neutral current decay were taken into account. Measured {ital R} values above {radical}{ital {bar s}}=56 GeV were slightly higher than the standard model prediction and this can be interpreted that the {ital Z}{sup 0} mass may be somewhat ligher than as was used.

• OSTI ID: 7023545
• Report Number(s): CONF-8906204--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 196:1
• Country of Publication: United States
• Language: English

Related Subjects

645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
CHARGED-CURRENT INTERACTIONS
CROSS SECTIONS
DATA
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
LIMITING VALUES
MASS
MASSLESS PARTICLES
MONTE CARLO METHOD
NEUTRAL-CURRENT INTERACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE KINEMATICS
PARTICLE PRODUCTION
PHOTONS
POSTULATED PARTICLES
STORAGE RINGS
TOP PARTICLES
TRISTAN STORAGE RINGS
Z NEUTRAL BOSONS