1996/05/31 by J. Lopez, Jorge L. Lopez, D. V. Nanopoulos +1 · 1 citation
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.55.397
published as Phys.Rev. D55 (1997) 397-406 · 22 pages, LaTeX, 3 figures (included). Final version to appear in Phys. Rev. D. Includes discussion on how to avoid potential FCNC problems and updated data on R_b and R_c
arxiv created 1996/10/14 · openalex publication_date 1997/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We show that leptophobic Z^\ensuremath' gauge bosons occur naturally in flipped SU(5) and may shift Rb in an interesting way without upsetting the good values of \ensuremathΓhad and Rc. Within a string-derived version of the model, we study three possible scenarios and the constraints imposed on model building that would allow the new symmetry to remain unbroken down to low energies. Such a Z^\ensuremath' gauge boson has generation nonuniversal couplings to quarks that violate parity maximally in the up-quark sector, and may contribute significantly to spin asymmetries in polarized pp scattering experiments now being prepared for BNL RHIC.