Leptophobic $Z'$ in stringy flipped SU(5)

Details Leptophobic $Z'$ in stringy flipped SU(5) Leptophobic $Z'$ in stringy flipped SU(5)

1996-05-20

arxiv.org/abs/hep-ph/9605359v3

Phys.Rev. D55 (1997) 397-406

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, LaTeX, 3 figures (included). Final version to appear in Phys. Rev. D. Includes discussion on how to avoid potential

Scientific paper

10.1103/PhysRevD.55.397

We show that leptophobic $Z'$ gauge bosons occur naturally in flipped SU(5) and may shift $R_b$ in an interesting way without upsetting the good values of $\Gamma_{had}$ and $R_c$. 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 $Z'$ 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 $pp$ scattering experiments now being prepared for RHIC.

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