Fourth-generation quarks and leptons

Journal Article · Sat Sep 01 04:00:00 EDT 1984 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.30.947· OSTI ID:6406856

Barger, V; Baer, H; Hagiwara, K; Phillips, R J.N.

We study the production, decay, and detection of fourth-generation quarks and leptons at present and future hadron colliders. We use a plausible extension of the quark-mixing systematics of three generations. We consider a range of heavy-quark masses that include overlapping generations and superheavy quarks that decay to the W boson. One particularly intriguing possibility is a new charge -(1/3) quark (v) with mass comparable to the t-quark mass. Hadronic vv-bar production could exceed tt-bar production, but there would be no substantial analog to the W..-->..tb-bar source. The v..-->..c decay would resemble t..-->..b decay in many respects, except that the v lifetime is long and might be measurable with microvertex detectors. We discuss how the cluster transverse mass, the identification of b and c hadrons, and possible diffractive leading-particle effects might differentiate between v and t semileptonic-decay signals. Electroweak W/sup +/W/sup -/ pair production is also evaluated as a benchmark with which superheavy-quark signals can be compared.

• Research Organization: Physics Department, University of Wisconsin, Madison, Wisconsin 53706
• OSTI ID: 6406856
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 30:5; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645203 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
DECAY
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
INTERMEDIATE BOSONS
LEPTONS
LIFETIME
MASS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUARKS
WEAK INTERACTIONS