Bounds of the mass of Z' and the neutral mixing angles in general SU(2)_L x SU(2)_R x U(1) models
| dc.creator | Chay, Junegone | |
| dc.creator | Lee, Kang Young | |
| dc.creator | Nam, Soo-hyeon | |
| dc.date | 1998-09-08 | |
| dc.date.accessioned | 2026-07-07T10:33:44Z | |
| dc.date.available | 2026-07-07T10:33:44Z | |
| dc.description | We consider phenomenological constraints on the mass $M_{Z^{\prime}}$ and the two mixing angles $θ_R$ and $ξ$ of the neutral sector in a very general class of $SU(2)_L \times SU(2)_R \times U(1)$ models using electroweak data. We do not make any specific assumptions such as left-right symmetry or the Higgs structure. The analysis of the neutral sector has the advantage that it has relatively fewer parameters compared to the charged sector since the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements in the right-handed sector do not enter into the analysis, hence the number of various possibilities from a big parameter space is reduced. We utilize theoretical considerations on the masses of the gauge particles and the mixing angles. We combine the precision electroweak data from LEP I and the low-energy neutral-current experimental data to constrain the parameters introduced in the model. It turns out that $M_{Z^{\prime}}> 400$ GeV, $-0.0028 <ξ<0.0065$ with little constraint on $θ_R$. In the left-right symmetric theory, $M_{Z^{\prime}}$ should be larger than 900 GeV. With these constraints, we compare the values for $σ(e^+ e^- \to μ^+ μ^-)$, $σ(e^+ e^- \to b\bar{b})$ and $A_{FB}^{\ell}$ at LEP II with experimental values. | |
| dc.description | 34 pages, a LaTeX file with macros elsart and pictex. 4 Figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9809298 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9809298 | |
| dc.identifier | Phys.Rev.D61:035002,2000 | |
| dc.identifier | doi:10.1103/PhysRevD.61.035002 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/179220 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Bounds of the mass of Z' and the neutral mixing angles in general SU(2)_L x SU(2)_R x U(1) models | |
| dc.type | text |