1994/09/22 by K. Hagiwara, D. Haidt, C. S. Kim +1 · 6 citations
Computer Science · Mathematics · Physics and Astronomy · #Bar (unit) #Combinatorics #Computational Physics and Python Applications #Electroweak interaction #Gauge (firearms) #Gauge boson #Gauge theory #Higgs boson #Lepton #Mathematical physics #Mathematics #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Propagator #Quantum Chromodynamics and Particle Interactions #Quark #Standard Model (mathematical formulation) #Top quark #Vertex (graph theory) #Weinberg angle #hep-ph
paper · pdf · doi:10.1007/bf01957770
published as Z.Phys.C64:559-620,1994; ERRATUM-ibid.C68:352,1995 · 123 pages, LaTeX (33 figures available via anonymous ftp), KEK-TH-375, KEK preprint 93-159, KANAZAWA-94-19, DESY 94-002, YUMS 94-22, SNUTP 94-82, to be published in Z.Phys.C
arxiv created 1994/09/22 · openalex publication_date 1994/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A novel approach to study electroweak physics at one-loop level in generic \rm SU(2)L × U(1)Y theories is introduced. It separates the 1-loop corrections into two pieces: process specific ones from vertex and box contributions, and universal ones from contributions to the gauge boson propagators. The latter are parametrized in terms of four effective form factors e2(q2), s2(q2), gZ2(q2) and gW2 (q2) corresponding to the γγ, γZ, ZZ and WW propagators. Under the assumption that only the Standard Model contributes to the process specific corrections, the magnitudes of the four form factors are determined at q2=0 and at q2=\mmz by fitting to all available precision experiments. These values are then compared systematically with predictions of \rm SU(2)L × U(1)Y theories. In all fits αs(\mz) and α(\mmz) are treated as external parameters in order to keep the interpretation as flexible as possible. The treatment of the electroweak data is presented in detail together with the relevant theoretical formulae used to interpret the data. No deviation from the Standard Model has been identified. Ranges of the top quark and Higgs boson masses are derived as functions of αs(\mz) and α(\mmz). Also discussed are consequences of the recent precision measurement of the left-right asymmetry at SLC as well as the impact of a top quark mass and an improved W mass measurement.