Extracting anomalous gluon--top-quark effective couplings at the supercolliders

Journal Article · Mon Nov 09 04:00:00 EST 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.2754· OSTI ID:7030073

Atwood, D; Aeppli, A; Soni, A ^[1]

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1. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)

Production of {ital t{bar t}} by gluon fusion fullowed by {ital t}{r arrow}{ital bW}{sup +}, {ital {bar t}}{r arrow}{ital bW}{sup {minus}}, and {ital W}{sup {plus minus}}{r arrow}{ital e}{sup {plus minus}}{nu}{sub {ital e}}({bar {nu}}{sub {ital e}}) is studied to extract the {ital CP}-violating chromoelectric dipole moment form factor of the top quark. The fact that the spin of the top quark, in its rest frame, is in the direction of the {ital e}{sup +} momentum facilitates the analysis. Expressions for the differential cross section and decays are given. We find that the Superconducting Super Collider or Large Hadron Collider, it is possible to put a limit of 10{sup {minus}20}{ital g}{sub {ital s}}-to 10{sup {minus}19}{ital g}{sub {ital s}} cm on these effective couplings through the use of optimal observables.'' Naive observables such as simple triple product correlations are typically an order of magnitude less effective.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 7030073
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 69:19; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662340* -- Hadron Interactions-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
BOSONS
COUPLING CONSTANTS
CP INVARIANCE
CROSS SECTIONS
ELEMENTARY PARTICLES
FIELD THEORIES
GLUONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
INVARIANCE PRINCIPLES
MATHEMATICAL MODELS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE KINEMATICS
PARTICLE MODELS
PARTICLE PRODUCTION
PERTURBATION THEORY
POSTULATED PARTICLES
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
TOP PARTICLES
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
WEINBERG-SALAM GAUGE MODEL