2006/04/12 by Giacomo Cacciapaglia, G. Cacciapaglia, Csaba Csáki +5 · 7 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.74.033011
published as Phys.Rev.D74:033011,2006 · 22 pages, 3 figures
arxiv created 2006/04/12 · openalex publication_date 2006/08/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a simple method for analyzing the impact of precision electroweak data above and below the Z peak on flavor-conserving, heavy new physics. We find that experiments have probed about ten combinations of new-physics effects, which to a good approximation can be condensed into the effective oblique parameters \stackrel^S, \stackrel^T, \stackrel^U, V, X, W, Y (we prove positivity constraints W,Y\ensuremath≥0) and three combinations of quark couplings (including a distinct parameter for the bottom). We apply our method to generic extra Z^\ensuremath' vectors.