Leptophobic $Z'$ in stringy flipped SU(5)
Abstract
We show that leptophobic gauge bosons occur naturally in flipped SU(5) and may shift in an interesting way without upsetting the good values of and . 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 gauge boson has generation non-universal couplings to quarks that violate parity maximally in the up-quark sector, and may contribute significantly to spin asymmetries in polarized scattering experiments now being prepared for RHIC.
Keywords
Cite
@article{arxiv.hep-ph/9605359,
title = {Leptophobic $Z'$ in stringy flipped SU(5)},
author = {J. Lopez and D. Nanopoulos},
journal= {arXiv preprint arXiv:hep-ph/9605359},
year = {2009}
}
Comments
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