Threshold production of heavy top quarks: QCD and the Higgs boson
- Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (US)
We calculate the threshold cross section for {ital e}{sup +}{ital e{minus}}{r arrow}{ital t{bar t}} to leading-logarithmic order in QCD, using a nonrelativistic approximation suggested by Fadin and Khoze. We study the mass range 100{le}{ital m}{sub {ital t}}{le}250 GeV, and show that the cross section is an excellent measure of {alpha}{sub {ital s}} for the lower portion of the mass range, while for a heavier top quark it is sensitive to the mass and couplings of the Higgs boson. We argue that a precise determination of {ital m}{sub {ital t}} and a measurement of {Gamma}{sub {ital t}} are possible. We also show that nonperturbative effects are small, confirming that the {ital t{bar t}} threshold is a detailed perturbative test of the standard model.
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 6202152
- Journal Information:
- Physical Review, D (Particles Fields); (USA), Vol. 43:5; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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ELECTRON-POSITRON INTERACTIONS
ANNIHILATION
QUARKS
PARTICLE PRODUCTION
BOUND STATE
COULOMB FIELD
CROSS SECTIONS
HIGGS BOSONS
MASS SPECTRA
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
STANDARD MODEL
THRESHOLD ENERGY
TOP PARTICLES
YUKAWA POTENTIAL
BASIC INTERACTIONS
ELECTRIC FIELDS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY
FERMIONS
FIELD THEORIES
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
NUCLEAR POTENTIAL
PARTICLE INTERACTIONS
PARTICLE MODELS
POSTULATED PARTICLES
POTENTIALS
QUANTUM FIELD THEORY
SPECTRA
UNIFIED GAUGE MODELS
645203* - High Energy Physics- Particle Interactions & Properties-Theoretical- Weak Interactions & Properties