2008/04/30 by Pascal Anastasopoulos, Francesco Fucito, Andrea Lionetto +3
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.78.085014
published as Phys.Rev.D78:085014,2008 · 45 pages, 8 eps figures, feynmf. Phenomenological section expanded. 2 plots and references added
arxiv created 2008/07/15 · openalex publication_date 2008/10/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
We study an extension of the minimal supersymmetric standard model by an anomalous Abelian vector multiplet and a St"uckelberg multiplet. The anomalies are cancelled by the Green-Schwarz mechanism and the addition of Chern-Simons terms. The advantage of this choice over the standard one is that it allows for arbitrary values of the quantum numbers of the extra U(1). As a first step toward the study of hadron annihilations producing four leptons in the final state (a clean signal which might be studied at LHC), we then compute the decays Z^\ensuremath'\ensuremath→Z0\ensuremathγ and Z^\ensuremath'\ensuremath→Z0Z0. We find that the largest values of the decay rate are \ensuremath∼10^\ensuremath-4 GeV, while the expected number of events per year at LHC is at most of the order of 10.