An S matrix analysis of the Z resonance

Adriani, O. ; Aguilar-Benitez, M. ; Ahlen, S. ; Gurtu, A. ; et., al (1993) An S matrix analysis of the Z resonance Physics Letters B, 315 (3-4). pp. 494-502. ISSN 0370-2693

Full text not available from this repository.

Official URL:

Related URL:


The S matrix ansatz is a rigorously model independent approach to describe the cross-sections and asymetries in e+e annihilation. Using the cross-sections and asymetries measured with the L3 detector during the 1990 and 1991 running period, we determine the mass and the width of the Z boson, the contributions of the Z exchange and the γZ interference. Including the polarization of the τ lepton in the analysis, the leptonic helicity amplitudes of the scattering process are determined assuming lepton universality. The results are compared with other model independent ansatzes as realized in ZFITTER. A systematic bias of the Z mass due to the γZ interference term is detected, which leads to an underestimation of the error on mZ for model independent determinations.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:83592
Deposited On:21 Feb 2012 12:42
Last Modified:21 Feb 2012 12:42

Repository Staff Only: item control page