2005/10/31 by A. V. Gulov, V. V. Skalozub · 2 citations
Physics and Astronomy · #Bhabha scattering #Coupling (piping) #High-Energy Particle Collisions Research #Measure (data warehouse) #Mixing (physics) #Observable #Particle physics theoretical and experimental studies #Process (computing) #Quantum Chromodynamics and Particle Interactions #Set (abstract data type) #State (computer science) #hep-ph
paper · pdf · doi:10.1134/s1063778807060129
published in Physics of Atomic Nuclei 70(6), 1100-1106 (Pleiades Publishing) · 15 pages, 4 figures. The paper was completely rewritten on the base of new data
arxiv created 2006/09/19 · openalex publication_date 2007/06/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The LEP2 data set on the Bhabha process is analyzed with the aim to detect the signals of the heavy virtual Z ′ gauge boson. The state interacting with the left-handed Standard Model doublets and called the chiral Z ′ is investigated. This particle was introduced already as the low-energy state allowed by the renormalizability. The contribution of the chiral- Z ′ state to the Bhabha process is described by two parameters: the coupling to electrons and the Z – Z ′ mixing angle. The sign-definite one-parameter observable is proposed to measure the Z ′ coupling to the electron current. The one-parameter fit of the data shows no signals of the particle. The alternative two-parameter fit of the differential cross sections is also performed. It also shows no chiral- Z ′ signals. The comparisons with other fits are discussed.