Effects of anomalousZ
0 decays on neutrino counting near theZ
0 peak |
| |
Authors: | Stephen Godfrey John N Ng P Kalyniak |
| |
Institution: | 1. Theory Group, TRIUMF, 4004 Wesbrook Mall, V6T 2A3, Vancouver, B.C., Canada 2. Physics Department, Carleton University, K1S 5B6, Ottawa, Ontario, Canada
|
| |
Abstract: | We study the implications of the anomalousZ 0 decays on neutrino counting ine + e ? collisions. The \(Z^0 \to l\bar l\gamma \) vertex is parametrized by an effective Lagrangian,L eff, satisfyingU(1)em gauge invariance, CP and chirality conservation. The parameters ofL eff are constrained by the ratio \(\Gamma (Z \to l\bar l\gamma )/\Gamma (Z \to l\bar l)\) , Bhabba scattering, and low energyv µ e scattering data. We find that the effect on neutrino counting can be significant but depends on the magnitude and relative signs of the parameters inL eff. We also find that accurate measurements of the cross-section \(\sigma (e^ + e^ - \to v\bar v\gamma )\) at theZ 0 peak can be used as a sensitive test for new physics. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|