Leptophobic Z{sup {prime}} in stringy flipped SU(5)

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.55.397· OSTI ID:474651

Lopez, J L ^[1]; Nanopoulos, D V ^[2]

---

1. Bonner Nuclear Lab, Department of Physics, Rice University, 6100 Main Street, Houston, Texas 77005 (United States)
2. Center for Theoretical Physics, Department of Physics, Texas AM University, College Station, Texas 77843-4242 (United States)

We show that leptophobic Z{sup {prime}} gauge bosons occur naturally in flipped SU(5) and may shift R{sub b} in an interesting way without upsetting the good values of {Gamma}{sub had} and R{sub 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 a Z{sup {prime}} 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. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Texas A&M Research Foundation
• DOE Contract Number: FG05-91ER40633; FG05-92ER40717
• OSTI ID: 474651
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 1 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COUPLING
MIXING
PARITY
QUARKS
SPIN
STRING MODELS
SU-5 GROUPS
Z NEUTRAL BOSONS