CERN Accelerating science

Article
Report number	hep-ph/0212163
Title	Model-independent constraints on contact interactions from LEP2 data analysis
Author(s)	Babich, A A ; Della Ricca, G ; Holt, P J ; Osland, P ; Pankov, A A ; Paver, N
Affiliation	(Bergen) ; (CERN) ; (Gomel) ; (Trieste)
Publication	2003
Imprint	11 Dec 2002
Number of pages	12
In:	Eur. Phys. J. C 29 (2003) 103-109
DOI	10.1140/epjc/s2003-01206-5
Subject category	Particle Physics - Phenomenology
Abstract	We derive model-independent constraints on four-fermion contact interaction-type dynamics from the published preliminary LEP2 experimental data on e^+e^- annihilation into \mu^+\mu^- and \tau^+\tau^- pairs measured at different energies between 130 and 207 GeV. The basic observables are chosen to be the total cross section and the forward-backward asymmetry, and the analysis realistically takes into account data uncertainties and correlations among measurements at the various energies. The combination of data from different energy points plays an important role in the determination of regions allowed for the Contact Interaction coupling constants. In contrast to the more common one-parameter analyses, we only obtain constraints on pairs of parameters rather than limits on individual ones.

Corresponding record in: Inspire
Email contact: [email protected]