How to expose t quarks hidden in p-barp collisions

Journal Article · Fri Jan 01 00:00:00 EST 1982 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.25.258· OSTI ID:5623149

Dechantsreiter, M; Halzen, F; McIntyre, P; Scott, D M

We describe a method to find tt-bar states. (i) Trigger on dileptons ll-bar with l = e,..mu..,tauxxx. (ii) Find events where heavy quarks have been associatively produced (p-barp..-->..(Q..-->..l+X)+Q-bar..-->.. l-bar+X)+X with Q = c, b, and (unidentified) t). Requiring that both leptons be accomplished by hadron showers is probably a sufficient signature to isolate these events. If not, one can further isolate these events through the identification of the striking quantum-number structure of these jets by triggering on multiple leptons and on strange and possibly charmed particles. (iii) Reject these events. (iv) Now study ll-bar invariant mass in the remaining events with a mass resolution of a few percent. Find the tt state with a signal-to-background ratio exceeding 10. We derive an ''almost'' model-independent lower limit on the number of lepton-pair events in the tt-bar peak and on the signal-to-background ratio. We demonstrate the feasibility of the experiment provided the mass of the t quark is not much larger than 30 GeV and the luminosity of the collider is not much less than 10/sup -29/ cm/sup -2/ sec/sup -1/.

• Research Organization: Physics Department, University of Wisconsin, Madison, Wisconsin 53706
• OSTI ID: 5623149
• Journal Information: Phys. Rev. D; (United States), Vol. 25:1
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
LEPTONS
PAIR PRODUCTION
PROTON-PROTON INTERACTIONS
JET MODEL
QUARKS
BOUND STATE
BRANCHING RATIO
DRELL MODEL
GLUONS
QUANTUM CHROMODYNAMICS
SEMILEPTONIC DECAY
STRUCTURE FUNCTIONS
BARYON-BARYON INTERACTIONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FUNCTIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
MATHEMATICAL MODELS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
POSTULATED PARTICLES
PROTON-NUCLEON INTERACTIONS
QUANTUM FIELD THEORY
WEAK PARTICLE DECAY
645207* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions
Baryon No. Greater than 1- (-1987)