TY - JOUR

T1 - Ratios of W±γ and Zγ cross sections

T2 - New tools in probing the weak boson sector at the Fermilab Tevatron

AU - Baur, U.

AU - Errede, S.

AU - Ohnemus, J.

PY - 1993

Y1 - 1993

N2 - The ratios Rγ,l=B(Z→l+l-)σ(Zγ)B(W→lν) σ(W±γ), Rγ,ν=B(Z→ν̄ν) σ(Zγ)B(W→lν)σ(W±γ), RWγ= σ(W±γ)σ(W±), and RZγ=σ(Zγ) σ(Z) are studied as tools to probe the electroweak boson self-interactions. As a function of the minimum photon transverse momentum, Rγ,l and Rγ, ν are found to directly reflect the radiation zero present in W±γ production in the standard model. All four ratios are sensitive to anomalous WWγ and/or ZZγZγγ couplings. The sensitivity of the cross-section ratios to the cuts imposed on the final-state particles, as well as the systematic uncertainties resulting from different parametrizations of parton distribution functions, the choice of the factorization scale Q2, and from higher-order QCD corrections, are explored. Taking into account these uncertainties, sensitivity limits for anomalous three gauge boson couplings, based on a measurement of the cross-section ratios with an integrated luminosity of 25 pb-1 at the Fermilab Tevatron, are estimated.

AB - The ratios Rγ,l=B(Z→l+l-)σ(Zγ)B(W→lν) σ(W±γ), Rγ,ν=B(Z→ν̄ν) σ(Zγ)B(W→lν)σ(W±γ), RWγ= σ(W±γ)σ(W±), and RZγ=σ(Zγ) σ(Z) are studied as tools to probe the electroweak boson self-interactions. As a function of the minimum photon transverse momentum, Rγ,l and Rγ, ν are found to directly reflect the radiation zero present in W±γ production in the standard model. All four ratios are sensitive to anomalous WWγ and/or ZZγZγγ couplings. The sensitivity of the cross-section ratios to the cuts imposed on the final-state particles, as well as the systematic uncertainties resulting from different parametrizations of parton distribution functions, the choice of the factorization scale Q2, and from higher-order QCD corrections, are explored. Taking into account these uncertainties, sensitivity limits for anomalous three gauge boson couplings, based on a measurement of the cross-section ratios with an integrated luminosity of 25 pb-1 at the Fermilab Tevatron, are estimated.

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U2 - 10.1103/PhysRevD.48.4103

DO - 10.1103/PhysRevD.48.4103

M3 - Article

AN - SCOPUS:0013545237

SN - 0556-2821

VL - 48

SP - 4103

EP - 4120

JO - Physical Review D

JF - Physical Review D

IS - 9

ER -