TY - JOUR
T1 - Global analysis of the top quark couplings to gauge bosons
AU - Malkawi, Ehab
AU - Yuan, C. P.
PY - 1994
Y1 - 1994
N2 - We propose to probe the electroweak symmetry-breaking sector by measuring the effective couplings of the top quark to gauge bosons. Using precision CERN LEP data, we constrain the nonuniversal couplings of t-t-Z and t-b-W, parametrized by κLNC, κRNC, κLCC, and κRCC, in the electroweak chiral Lagrangian framework. Different scenarios of electroweak symmetry breaking will imply different correlations among these parameters. We find that at the order of mt2lnΛ2, in which Λ∼4πv is the cutoff scale of the effective theory, κLNC is already constrained by LEP data. In models with an approximate custodial symmetry, a positive κLCC is preferred. κRCC can be constrained by studying the direct detection of the top quark at the Fermilab Tevatron and the CERN LHC. At the NLC, κLNC and κRNC can be better measured.
AB - We propose to probe the electroweak symmetry-breaking sector by measuring the effective couplings of the top quark to gauge bosons. Using precision CERN LEP data, we constrain the nonuniversal couplings of t-t-Z and t-b-W, parametrized by κLNC, κRNC, κLCC, and κRCC, in the electroweak chiral Lagrangian framework. Different scenarios of electroweak symmetry breaking will imply different correlations among these parameters. We find that at the order of mt2lnΛ2, in which Λ∼4πv is the cutoff scale of the effective theory, κLNC is already constrained by LEP data. In models with an approximate custodial symmetry, a positive κLCC is preferred. κRCC can be constrained by studying the direct detection of the top quark at the Fermilab Tevatron and the CERN LHC. At the NLC, κLNC and κRNC can be better measured.
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U2 - 10.1103/PhysRevD.50.4462
DO - 10.1103/PhysRevD.50.4462
M3 - Article
AN - SCOPUS:0001685562
VL - 50
SP - 4462
EP - 4477
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 0556-2821
IS - 7
ER -