2006/05/24 by Guido Marandella, Marandella, Guido
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.hep-ph/0605265
openalex publication_date 2006/05/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We show how precision electroweak data, assuming CP conservation and flavor universality, despite being sensitive to 20 dimension 6 operators, constrain severely only 9 combinations of them. We define a set of 7 oblique parameters S, T, U, V, X,W,Y which fully describe corrections to the leptonic observables. We add two additional parameters δεq, δCq to take into account the most precise hadronic observables. Another parameter δεb is considered for the bottom quark if flavor universality is not assumed for the third generation of quarks. We show that the approximation is extremely satisfactory testing it on a set of random new physics models and on some famous Z' gauge bosons.